42155090 has 16 divisors (see below), whose sum is σ = 79178688. Its totient is φ = 16128816.

The previous prime is 42155089. The next prime is 42155101. The reversal of 42155090 is 9055124.

It is a super-2 number, since 2×42155090² = 3554103225816200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91412 + ... + 91871.

It is an arithmetic number, because the mean of its divisors is an integer number (4948668).

Almost surely, 2^42155090 is an apocalyptic number.

42155090 is a deficient number, since it is larger than the sum of its proper divisors (37023598).

42155090 is a wasteful number, since it uses less digits than its factorization.

42155090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183313.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 42155090 is about 6492.6951260628. The cubic root of 42155090 is about 348.0299936715.

The spelling of 42155090 in words is "forty-two million, one hundred fifty-five thousand, ninety".