720404125 has 24 divisors (see below), whose sum is σ = 1045859256. Its totient is φ = 493987200.

The previous prime is 720404093. The next prime is 720404129. The reversal of 720404125 is 521404027.

It can be written as a sum of positive squares in 4 ways, for example, as 229249881 + 491154244 = 15141^2 + 22162^2 .

It is not a de Polignac number, because 720404125 - 2⁵ = 720404093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 720404125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720404129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52684 + ... + 64933.

It is an arithmetic number, because the mean of its divisors is an integer number (43577469).

Almost surely, 2^720404125 is an apocalyptic number.

It is an amenable number.

720404125 is a deficient number, since it is larger than the sum of its proper divisors (325455131).

720404125 is a wasteful number, since it uses less digits than its factorization.

720404125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117646 (or 117629 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 720404125 is about 26840.3450983776. The cubic root of 720404125 is about 896.4486075486.

The spelling of 720404125 in words is "seven hundred twenty million, four hundred four thousand, one hundred twenty-five".