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142021040 = 2457253609
BaseRepresentation
bin10000111011100…
…01000110110000
3100220020102020112
420131301012300
5242324133130
622032000452
73343105340
oct1035610660
9326212215
10142021040
1173192567
123b690128
1323567225
1414c0cd20
15c705495
hex87711b0

142021040 has 40 divisors (see below), whose sum is σ = 377371680. Its totient is φ = 48692736.

The previous prime is 142021031. The next prime is 142021057. The reversal of 142021040 is 40120241.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126245 + ... + 127364.

It is an arithmetic number, because the mean of its divisors is an integer number (9434292).

Almost surely, 2142021040 is an apocalyptic number.

142021040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142021040 is an abundant number, since it is smaller than the sum of its proper divisors (235350640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142021040 is a wasteful number, since it uses less digits than its factorization.

142021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253629 (or 253623 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 142021040 is about 11917.2580739027. The cubic root of 142021040 is about 521.7361104576.

Adding to 142021040 its reverse (40120241), we get a palindrome (182141281).

The spelling of 142021040 in words is "one hundred forty-two million, twenty-one thousand, forty".

Divisors: 1 2 4 5 7 8 10 14 16 20 28 35 40 56 70 80 112 140 280 560 253609 507218 1014436 1268045 1775263 2028872 2536090 3550526 4057744 5072180 7101052 8876315 10144360 14202104 17752630 20288720 28404208 35505260 71010520 142021040