721460125 has 8 divisors (see below), whose sum is σ = 900382392. Its totient is φ = 577168000.

The previous prime is 721460119. The next prime is 721460143. The reversal of 721460125 is 521064127.

It can be written as a sum of positive squares in 4 ways, for example, as 13155129 + 708304996 = 3627^2 + 26614^2 .

It is a de Polignac number, because none of the positive numbers 2^k-721460125 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 721460093 and 721460102.

It is a congruent number.

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, 2885716 + ... + 2885965.

It is an arithmetic number, because the mean of its divisors is an integer number (112547799).

Almost surely, 2^721460125 is an apocalyptic number.

It is an amenable number.

721460125 is a deficient number, since it is larger than the sum of its proper divisors (178922267).

721460125 is an equidigital number, since it uses as much as digits as its factorization.

721460125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771696 (or 5771686 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 721460125 is about 26860.0097728947. The cubic root of 721460125 is about 896.8864116117.

The spelling of 721460125 in words is "seven hundred twenty-one million, four hundred sixty thousand, one hundred twenty-five".