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42172140 = 2235702869
BaseRepresentation
bin1010000011011…
…1111011101100
32221100120022010
42200313323230
541244002030
64103521220
71021312563
oct240677354
987316263
1042172140
112189460a
1212159210
13897743a
14585abda
153a806b0
hex2837eec

42172140 has 24 divisors (see below), whose sum is σ = 118082160. Its totient is φ = 11245888.

The previous prime is 42172139. The next prime is 42172157. The reversal of 42172140 is 4127124.

It is a happy number.

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, 351375 + ... + 351494.

It is an arithmetic number, because the mean of its divisors is an integer number (4920090).

Almost surely, 242172140 is an apocalyptic number.

It is an amenable number.

42172140 is an abundant number, since it is smaller than the sum of its proper divisors (75910020).

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

42172140 is a wasteful number, since it uses less digits than its factorization.

42172140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702881 (or 702879 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 42172140 is about 6494.0080073865. The cubic root of 42172140 is about 348.0769086195.

Adding to 42172140 its reverse (4127124), we get a palindrome (46299264).

The spelling of 42172140 in words is "forty-two million, one hundred seventy-two thousand, one hundred forty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 702869 1405738 2108607 2811476 3514345 4217214 7028690 8434428 10543035 14057380 21086070 42172140