42012455 has 4 divisors (see below), whose sum is σ = 50414952. Its totient is φ = 33609960.

The previous prime is 42012431. The next prime is 42012461. The reversal of 42012455 is 55421024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42012455 - 2²⁴ = 25235239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42012455.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4201241 + ... + 4201250.

It is an arithmetic number, because the mean of its divisors is an integer number (12603738).

Almost surely, 2^42012455 is an apocalyptic number.

42012455 is a deficient number, since it is larger than the sum of its proper divisors (8402497).

42012455 is an equidigital number, since it uses as much as digits as its factorization.

42012455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8402496.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42012455 is about 6481.7015512904. The cubic root of 42012455 is about 347.6370213402.

Adding to 42012455 its reverse (55421024), we get a palindrome (97433479).

The spelling of 42012455 in words is "forty-two million, twelve thousand, four hundred fifty-five".