401802025 has 27 divisors (see below), whose sum is σ = 528341463. Its totient is φ = 303080400.

The previous prime is 401802007. The next prime is 401802029. The reversal of 401802025 is 520208104.

The square root of 401802025 is 20045.

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., 144648729 + 257153296 = 12027^2 + 16036^2 .

It is not a de Polignac number, because 401802025 - 2¹⁵ = 401769257 is a prime.

It is a super-2 number, since 2×401802025² = 322889734588201250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401801987 and 401802005.

It is not an unprimeable number, because it can be changed into a prime (401802029) 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, 1904170 + ... + 1904380.

Almost surely, 2^401802025 is an apocalyptic number.

401802025 is the 20045-th square number.

401802025 is the 10023-rd centered octagonal number.

It is an amenable number.

401802025 is a deficient number, since it is larger than the sum of its proper divisors (126539438).

401802025 is an equidigital number, since it uses as much as digits as its factorization.

401802025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The cubic root of 401802025 is about 737.9110951380.

The spelling of 401802025 in words is "four hundred one million, eight hundred two thousand, twenty-five".