402506425 has 12 divisors (see below), whose sum is σ = 505123920. Its totient is φ = 318123920.

The previous prime is 402506383. The next prime is 402506441. The reversal of 402506425 is 524605204.

It is not a de Polignac number, because 402506425 - 2⁹ = 402505913 is a prime.

It is a super-2 number, since 2×402506425² = 324022844332561250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402506393 and 402506402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94915 + ... + 99064.

It is an arithmetic number, because the mean of its divisors is an integer number (42093660).

Almost surely, 2^402506425 is an apocalyptic number.

It is an amenable number.

402506425 is a deficient number, since it is larger than the sum of its proper divisors (102617495).

402506425 is a wasteful number, since it uses less digits than its factorization.

402506425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194072 (or 194067 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 402506425 is about 20062.5627724875. The cubic root of 402506425 is about 738.3420545770.

The spelling of 402506425 in words is "four hundred two million, five hundred six thousand, four hundred twenty-five".