404040125 has 8 divisors (see below), whose sum is σ = 504242232. Its totient is φ = 323232000.

The previous prime is 404040101. The next prime is 404040127. The reversal of 404040125 is 521040404.

It can be written as a sum of positive squares in 4 ways, for example, as 52215076 + 351825049 = 7226^2 + 18757^2 .

It is not a de Polignac number, because 404040125 - 2²⁶ = 336931261 is a prime.

It is a super-2 number, since 2×404040125² = 326496845220031250, 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 = 404040097 and 404040106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404040127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1616036 + ... + 1616285.

It is an arithmetic number, because the mean of its divisors is an integer number (63030279).

Almost surely, 2^404040125 is an apocalyptic number.

It is an amenable number.

404040125 is a deficient number, since it is larger than the sum of its proper divisors (100202107).

404040125 is an equidigital number, since it uses as much as digits as its factorization.

404040125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232336 (or 3232326 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 404040125 is about 20100.7493641406. The cubic root of 404040125 is about 739.2786524321.

Adding to 404040125 its reverse (521040404), we get a palindrome (925080529).

The spelling of 404040125 in words is "four hundred four million, forty thousand, one hundred twenty-five".