725271253 has 4 divisors (see below), whose sum is σ = 828881440. Its totient is φ = 621661068.

The previous prime is 725271233. The next prime is 725271301. The reversal of 725271253 is 352172527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-725271253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725271233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51805083 + ... + 51805096.

It is an arithmetic number, because the mean of its divisors is an integer number (207220360).

Almost surely, 2^725271253 is an apocalyptic number.

It is an amenable number.

725271253 is a deficient number, since it is larger than the sum of its proper divisors (103610187).

725271253 is a wasteful number, since it uses less digits than its factorization.

725271253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103610186.

The product of its digits is 29400, while the sum is 34.

The square root of 725271253 is about 26930.8606063750. The cubic root of 725271253 is about 898.4629125553.

The spelling of 725271253 in words is "seven hundred twenty-five million, two hundred seventy-one thousand, two hundred fifty-three".