72545252 has 24 divisors (see below), whose sum is σ = 139633536. Its totient is φ = 32768928.

The previous prime is 72545227. The next prime is 72545261. The reversal of 72545252 is 25254527.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12398 + ... + 17285.

It is an arithmetic number, because the mean of its divisors is an integer number (5818064).

Almost surely, 2^72545252 is an apocalyptic number.

It is an amenable number.

72545252 is a deficient number, since it is larger than the sum of its proper divisors (67088284).

72545252 is a wasteful number, since it uses less digits than its factorization.

72545252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29747 (or 29745 counting only the distinct ones).

The product of its digits is 28000, while the sum is 32.

The square root of 72545252 is about 8517.3500573829. The cubic root of 72545252 is about 417.0642820619.

Adding to 72545252 its reverse (25254527), we get a palindrome (97799779).

It can be divided in two parts, 7254525 and 2, that added together give a palindrome (7254527).

The spelling of 72545252 in words is "seventy-two million, five hundred forty-five thousand, two hundred fifty-two".