42155642 has 32 divisors (see below), whose sum is σ = 70156800. Its totient is φ = 18908208.

The previous prime is 42155621. The next prime is 42155653. The reversal of 42155642 is 24655124.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121313 + ... + 121659.

It is an arithmetic number, because the mean of its divisors is an integer number (2192400).

Almost surely, 2^42155642 is an apocalyptic number.

42155642 is a deficient number, since it is larger than the sum of its proper divisors (28001158).

42155642 is a wasteful number, since it uses less digits than its factorization.

42155642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530.

The product of its digits is 9600, while the sum is 29.

The square root of 42155642 is about 6492.7376352352. The cubic root of 42155642 is about 348.0315127582.

The spelling of 42155642 in words is "forty-two million, one hundred fifty-five thousand, six hundred forty-two".