402149925 has 18 divisors (see below), whose sum is σ = 720295602. Its totient is φ = 214479840.

The previous prime is 402149921. The next prime is 402149947. The reversal of 402149925 is 529941204.

It can be written as a sum of positive squares in 3 ways, for example, as 29582721 + 372567204 = 5439^2 + 19302^2 .

It is not a de Polignac number, because 402149925 - 2² = 402149921 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 402149925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402149921) 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, 893442 + ... + 893891.

Almost surely, 2^402149925 is an apocalyptic number.

402149925 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402149925 is a deficient number, since it is larger than the sum of its proper divisors (318145677).

402149925 is a wasteful number, since it uses less digits than its factorization.

402149925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787349 (or 1787341 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 402149925 is about 20053.6760969155. The cubic root of 402149925 is about 738.1240069671.

The spelling of 402149925 in words is "four hundred two million, one hundred forty-nine thousand, nine hundred twenty-five".