42940155 has 16 divisors (see below), whose sum is σ = 71074080. Its totient is φ = 22111488.

The previous prime is 42940153. The next prime is 42940159. The reversal of 42940155 is 55104924.

It is not a de Polignac number, because 42940155 - 2¹ = 42940153 is a prime.

It is a super-2 number, since 2×42940155² = 3687713822848050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42940153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48922 + ... + 49791.

It is an arithmetic number, because the mean of its divisors is an integer number (4442130).

Almost surely, 2^42940155 is an apocalyptic number.

42940155 is a deficient number, since it is larger than the sum of its proper divisors (28133925).

42940155 is a wasteful number, since it uses less digits than its factorization.

42940155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98750.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 42940155 is about 6552.8737970451. The cubic root of 42940155 is about 350.1772027852.

The spelling of 42940155 in words is "forty-two million, nine hundred forty thousand, one hundred fifty-five".