42012555 has 24 divisors (see below), whose sum is σ = 72793008. Its totient is φ = 20681856.

The previous prime is 42012547. The next prime is 42012563. The reversal of 42012555 is 55521024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42012547) and next prime (42012563).

It is not a de Polignac number, because 42012555 - 2³ = 42012547 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 5752 + ... + 10821.

It is an arithmetic number, because the mean of its divisors is an integer number (3033042).

Almost surely, 2^42012555 is an apocalyptic number.

42012555 is a deficient number, since it is larger than the sum of its proper divisors (30780453).

42012555 is a wasteful number, since it uses less digits than its factorization.

42012555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16607 (or 16594 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 42012555 is about 6481.7092653096. The cubic root of 42012555 is about 347.6372971606.

Adding to 42012555 its reverse (55521024), we get a palindrome (97533579).

The spelling of 42012555 in words is "forty-two million, twelve thousand, five hundred fifty-five".