42312492 has 72 divisors (see below), whose sum is σ = 110990880. Its totient is φ = 13582080.

The previous prime is 42312481. The next prime is 42312493. The reversal of 42312492 is 29421324.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (42312493) by changing a digit.

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, 160753 + ... + 161015.

It is an arithmetic number, because the mean of its divisors is an integer number (1541540).

Almost surely, 2^42312492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42312492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55495440).

42312492 is an abundant number, since it is smaller than the sum of its proper divisors (68678388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42312492 is a wasteful number, since it uses less digits than its factorization.

42312492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 418 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 42312492 is about 6504.8053006989. The cubic root of 42312492 is about 348.4626229360.

The spelling of 42312492 in words is "forty-two million, three hundred twelve thousand, four hundred ninety-two".