72451136 has 28 divisors (see below), whose sum is σ = 144432528. Its totient is φ = 36058752.

The previous prime is 72451133. The next prime is 72451157. The reversal of 72451136 is 63115427.

It is a junction number, because it is equal to n+sod(n) for n = 72451099 and 72451108.

It is not an unprimeable number, because it can be changed into a prime (72451133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12035 + ... + 17021.

Almost surely, 2^72451136 is an apocalyptic number.

It is an amenable number.

72451136 is a deficient number, since it is larger than the sum of its proper divisors (71981392).

72451136 is a wasteful number, since it uses less digits than its factorization.

72451136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5226 (or 5216 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 72451136 is about 8511.8233064368. The cubic root of 72451136 is about 416.8838456780.

The spelling of 72451136 in words is "seventy-two million, four hundred fifty-one thousand, one hundred thirty-six".