155847642 has 32 divisors (see below), whose sum is σ = 320785920. Its totient is φ = 50446080.

The previous prime is 155847641. The next prime is 155847647. The reversal of 155847642 is 246748551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 155847594 and 155847603.

It is not an unprimeable number, because it can be changed into a prime (155847641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55959 + ... + 58677.

It is an arithmetic number, because the mean of its divisors is an integer number (10024560).

Almost surely, 2^155847642 is an apocalyptic number.

155847642 is an abundant number, since it is smaller than the sum of its proper divisors (164938278).

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

155847642 is a wasteful number, since it uses less digits than its factorization.

155847642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998.

The product of its digits is 268800, while the sum is 42.

The square root of 155847642 is about 12483.8953055527. The cubic root of 155847642 is about 538.1459529478.

Subtracting 155847642 from its reverse (246748551), we obtain a palindrome (90900909).

The spelling of 155847642 in words is "one hundred fifty-five million, eight hundred forty-seven thousand, six hundred forty-two".