42312920 has 32 divisors (see below), whose sum is σ = 102528720. Its totient is φ = 15623040.

The previous prime is 42312901. The next prime is 42312929. The reversal of 42312920 is 2921324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42312929) 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 7 ways as a sum of consecutive naturals, for example, 40166 + ... + 41205.

Almost surely, 2^42312920 is an apocalyptic number.

42312920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42312920 is an abundant number, since it is smaller than the sum of its proper divisors (60215800).

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

42312920 is a wasteful number, since it uses less digits than its factorization.

42312920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81395 (or 81391 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42312920 is about 6504.8381993713. The cubic root of 42312920 is about 348.4637978570.

The spelling of 42312920 in words is "forty-two million, three hundred twelve thousand, nine hundred twenty".