490401025 has 27 divisors (see below), whose sum is σ = 628670979. Its totient is φ = 379476720.

The previous prime is 490401017. The next prime is 490401029. The reversal of 490401025 is 520104094.

The square root of 490401025 is 22145.

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

It can be written as a sum of positive squares in only one way, i.e., 176544369 + 313856656 = 13287^2 + 17716^2 .

It is not a de Polignac number, because 490401025 - 2³ = 490401017 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 not an unprimeable number, because it can be changed into a prime (490401029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4761124 + ... + 4761226.

Almost surely, 2^490401025 is an apocalyptic number.

490401025 is the 22145-th square number.

490401025 is the 11073-rd centered octagonal number.

It is an amenable number.

490401025 is a deficient number, since it is larger than the sum of its proper divisors (138269954).

490401025 is an equidigital number, since it uses as much as digits as its factorization.

490401025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The cubic root of 490401025 is about 788.5885307859.

Multiplying 490401025 by its sum of digits (25), we get a square (12260025625 = 110725²).

490401025 divided by its sum of digits (25) gives a square (19616041 = 4429²).

The spelling of 490401025 in words is "four hundred ninety million, four hundred one thousand, twenty-five".