400415725 has 6 divisors (see below), whose sum is σ = 496515530. Its totient is φ = 320332560.

The previous prime is 400415711. The next prime is 400415753. The reversal of 400415725 is 527514004.

It can be written as a sum of positive squares in 3 ways, for example, as 141752836 + 258662889 = 11906^2 + 16083^2 .

It is not a de Polignac number, because 400415725 - 2¹¹ = 400413677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400415693 and 400415702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8008290 + ... + 8008339.

Almost surely, 2^400415725 is an apocalyptic number.

It is an amenable number.

400415725 is a deficient number, since it is larger than the sum of its proper divisors (96099805).

400415725 is a wasteful number, since it uses less digits than its factorization.

400415725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16016639 (or 16016634 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 400415725 is about 20010.3904259762. The cubic root of 400415725 is about 737.0614686809.

Adding to 400415725 its reverse (527514004), we get a palindrome (927929729).

The spelling of 400415725 in words is "four hundred million, four hundred fifteen thousand, seven hundred twenty-five".