402040425 has 24 divisors (see below), whose sum is σ = 665304640. Its totient is φ = 214228800.

The previous prime is 402040421. The next prime is 402040439. The reversal of 402040425 is 524040204.

It is not a de Polignac number, because 402040425 - 2² = 402040421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402040421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129036 + ... + 132114.

Almost surely, 2^402040425 is an apocalyptic number.

It is an amenable number.

402040425 is a deficient number, since it is larger than the sum of its proper divisors (263264215).

402040425 is a wasteful number, since it uses less digits than its factorization.

402040425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4833 (or 4828 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 402040425 is about 20050.9457382937. The cubic root of 402040425 is about 738.0570071488.

Adding to 402040425 its reverse (524040204), we get a palindrome (926080629).

The spelling of 402040425 in words is "four hundred two million, forty thousand, four hundred twenty-five".