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142388 = 2235597
BaseRepresentation
bin100010110000110100
321020022122
4202300310
514024023
63015112
71132061
oct426064
9236278
10142388
1197a84
126a498
134ca6c
1439c68
152c2c8
hex22c34

142388 has 6 divisors (see below), whose sum is σ = 249186. Its totient is φ = 71192.

The previous prime is 142381. The next prime is 142391. The reversal of 142388 is 883241.

It can be written as a sum of positive squares in only one way, i.e., 94864 + 47524 = 308^2 + 218^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17795 + ... + 17802.

It is an arithmetic number, because the mean of its divisors is an integer number (41531).

2142388 is an apocalyptic number.

It is an amenable number.

142388 is a deficient number, since it is larger than the sum of its proper divisors (106798).

142388 is a wasteful number, since it uses less digits than its factorization.

142388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35601 (or 35599 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 142388 is about 377.3433449791. The cubic root of 142388 is about 52.2185085299.

The spelling of 142388 in words is "one hundred forty-two thousand, three hundred eighty-eight".

Divisors: 1 2 4 35597 71194 142388