42451312 has 20 divisors (see below), whose sum is σ = 87088176. Its totient is φ = 19976960.

The previous prime is 42451291. The next prime is 42451319. The reversal of 42451312 is 21315424.

It is a super-2 number, since 2×42451312² = 3604227781042688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42451319) 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 3 ways as a sum of consecutive naturals, for example, 77764 + ... + 78307.

Almost surely, 2^42451312 is an apocalyptic number.

It is an amenable number.

42451312 is an abundant number, since it is smaller than the sum of its proper divisors (44636864).

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

42451312 is a wasteful number, since it uses less digits than its factorization.

42451312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156096 (or 156090 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 42451312 is about 6515.4671359773. The cubic root of 42451312 is about 348.8432888926.

Adding to 42451312 its reverse (21315424), we get a palindrome (63766736).

The spelling of 42451312 in words is "forty-two million, four hundred fifty-one thousand, three hundred twelve".