404102025 has 18 divisors (see below), whose sum is σ = 723792030. Its totient is φ = 215520960.

The previous prime is 404102011. The next prime is 404102029. The reversal of 404102025 is 520201404.

It can be written as a sum of positive squares in 3 ways, for example, as 45643536 + 358458489 = 6756^2 + 18933^2 .

It is not a de Polignac number, because 404102025 - 2⁵ = 404101993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 404101989 and 404102007.

It is not an unprimeable number, because it can be changed into a prime (404102029) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 897780 + ... + 898229.

Almost surely, 2^404102025 is an apocalyptic number.

404102025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

404102025 is a deficient number, since it is larger than the sum of its proper divisors (319690005).

404102025 is a wasteful number, since it uses less digits than its factorization.

404102025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796025 (or 1796017 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 404102025 is about 20102.2890487626. The cubic root of 404102025 is about 739.3164036429.

Adding to 404102025 its reverse (520201404), we get a palindrome (924303429).

The spelling of 404102025 in words is "four hundred four million, one hundred two thousand, twenty-five".