405451725 has 48 divisors (see below), whose sum is σ = 781795200. Its totient is φ = 185337600.

The previous prime is 405451721. The next prime is 405451757. The reversal of 405451725 is 527154504.

It is not a de Polignac number, because 405451725 - 2² = 405451721 is a prime.

It is a super-2 number, since 2×405451725² = 328782202610951250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405451721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17845 + ... + 33605.

It is an arithmetic number, because the mean of its divisors is an integer number (16287400).

Almost surely, 2^405451725 is an apocalyptic number.

It is an amenable number.

405451725 is a deficient number, since it is larger than the sum of its proper divisors (376343475).

405451725 is a wasteful number, since it uses less digits than its factorization.

405451725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15795 (or 15776 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 33.

The square root of 405451725 is about 20135.8318675937. The cubic root of 405451725 is about 740.1385940801.

The spelling of 405451725 in words is "four hundred five million, four hundred fifty-one thousand, seven hundred twenty-five".