720654025 has 81 divisors (see below), whose sum is σ = 1145021301. Its totient is φ = 448418880.

The previous prime is 720654019. The next prime is 720654041. The reversal of 720654025 is 520456027.

The square root of 720654025 is 26845.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 185749641 + 534904384 = 13629^2 + 23128^2 .

It is not a de Polignac number, because 720654025 - 2⁷ = 720653897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 12214446 + ... + 12214504.

Almost surely, 2^720654025 is an apocalyptic number.

720654025 is the 26845-th square number.

720654025 is the 13423-rd centered octagonal number.

It is an amenable number.

720654025 is a deficient number, since it is larger than the sum of its proper divisors (424367276).

720654025 is a wasteful number, since it uses less digits than its factorization.

720654025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The cubic root of 720654025 is about 896.5522515083.

The spelling of 720654025 in words is "seven hundred twenty million, six hundred fifty-four thousand, twenty-five".