71572725 has 72 divisors (see below), whose sum is σ = 151656960. Its totient is φ = 31570560.

The previous prime is 71572687. The next prime is 71572729. The reversal of 71572725 is 52727517.

It is not a de Polignac number, because 71572725 - 2⁸ = 71572469 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71572725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71572729) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 44892 + ... + 46458.

Almost surely, 2^71572725 is an apocalyptic number.

71572725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71572725 is an abundant number, since it is smaller than the sum of its proper divisors (80084235).

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

71572725 is a wasteful number, since it uses less digits than its factorization.

71572725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619 (or 1611 counting only the distinct ones).

The product of its digits is 34300, while the sum is 36.

The square root of 71572725 is about 8460.0664891004. The cubic root of 71572725 is about 415.1921981950.

The spelling of 71572725 in words is "seventy-one million, five hundred seventy-two thousand, seven hundred twenty-five".