908721025 has 9 divisors (see below), whose sum is σ = 1127001001. Its totient is φ = 726856240.

The previous prime is 908721017. The next prime is 908721071. The reversal of 908721025 is 520127809.

The square root of 908721025 is 30145.

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 128300929 + 780420096 = 11327^2 + 27936^2 .

It is not a de Polignac number, because 908721025 - 2³ = 908721017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 147711 + ... + 153739.

Almost surely, 2^908721025 is an apocalyptic number.

908721025 is the 30145-th square number.

908721025 is the 15073-rd centered octagonal number.

It is an amenable number.

908721025 is a deficient number, since it is larger than the sum of its proper divisors (218279976).

908721025 is an frugal number, since it uses more digits than its factorization.

908721025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12068 (or 6034 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The cubic root of 908721025 is about 968.5979052238.

The spelling of 908721025 in words is "nine hundred eight million, seven hundred twenty-one thousand, twenty-five".