42991512 has 32 divisors (see below), whose sum is σ = 108199680. Its totient is φ = 14234400.

The previous prime is 42991499. The next prime is 42991523. The reversal of 42991512 is 21519924.

It is a super-2 number, since 2×42991512² = 3696540208092288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2308 + ... + 9555.

It is an arithmetic number, because the mean of its divisors is an integer number (3381240).

Almost surely, 2^42991512 is an apocalyptic number.

It is an amenable number.

42991512 is an abundant number, since it is smaller than the sum of its proper divisors (65208168).

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

42991512 is a wasteful number, since it uses less digits than its factorization.

42991512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12023 (or 12019 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 42991512 is about 6556.7912884276. The cubic root of 42991512 is about 350.3167527057.

The spelling of 42991512 in words is "forty-two million, nine hundred ninety-one thousand, five hundred twelve".