403642625 has 8 divisors (see below), whose sum is σ = 503746152. Its totient is φ = 322914000.

The previous prime is 403642621. The next prime is 403642637. The reversal of 403642625 is 526246304.

It can be written as a sum of positive squares in 4 ways, for example, as 1399489 + 402243136 = 1183^2 + 20056^2 .

It is not a de Polignac number, because 403642625 - 2² = 403642621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403642591 and 403642600.

It is not an unprimeable number, because it can be changed into a prime (403642621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1614446 + ... + 1614695.

It is an arithmetic number, because the mean of its divisors is an integer number (62968269).

Almost surely, 2^403642625 is an apocalyptic number.

It is an amenable number.

403642625 is a deficient number, since it is larger than the sum of its proper divisors (100103527).

403642625 is an equidigital number, since it uses as much as digits as its factorization.

403642625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229156 (or 3229146 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 403642625 is about 20090.8592399628. The cubic root of 403642625 is about 739.0361355237.

Adding to 403642625 its reverse (526246304), we get a palindrome (929888929).

The spelling of 403642625 in words is "four hundred three million, six hundred forty-two thousand, six hundred twenty-five".