402661025 has 24 divisors (see below), whose sum is σ = 544548480. Its totient is φ = 293567040.

The previous prime is 402661013. The next prime is 402661067. The reversal of 402661025 is 520166204.

It is not a de Polignac number, because 402661025 - 2⁶ = 402660961 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 402660985 and 402661003.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17834 + ... + 33516.

It is an arithmetic number, because the mean of its divisors is an integer number (22689520).

Almost surely, 2^402661025 is an apocalyptic number.

It is an amenable number.

402661025 is a deficient number, since it is larger than the sum of its proper divisors (141887455).

402661025 is a wasteful number, since it uses less digits than its factorization.

402661025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15785 (or 15780 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 402661025 is about 20066.4153500320. The cubic root of 402661025 is about 738.4365732092.

The spelling of 402661025 in words is "four hundred two million, six hundred sixty-one thousand, twenty-five".