725356457 has 6 divisors (see below), whose sum is σ = 843782058. Its totient is φ = 621734064.

The previous prime is 725356453. The next prime is 725356537. The reversal of 725356457 is 754653527.

It can be written as a sum of positive squares in only one way, i.e., 575808016 + 149548441 = 23996^2 + 12229^2 .

It is not a de Polignac number, because 725356457 - 2² = 725356453 is a prime.

It is a super-2 number, since 2×725356457² = 1052283979423185698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (725356453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7401548 + ... + 7401645.

It is an arithmetic number, because the mean of its divisors is an integer number (140630343).

Almost surely, 2^725356457 is an apocalyptic number.

It is an amenable number.

725356457 is a deficient number, since it is larger than the sum of its proper divisors (118425601).

725356457 is a wasteful number, since it uses less digits than its factorization.

725356457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14803207 (or 14803200 counting only the distinct ones).

The product of its digits is 882000, while the sum is 44.

The square root of 725356457 is about 26932.4424625766. The cubic root of 725356457 is about 898.4980946274.

The spelling of 725356457 in words is "seven hundred twenty-five million, three hundred fifty-six thousand, four hundred fifty-seven".