403898121 has 36 divisors (see below), whose sum is σ = 679019796. Its totient is φ = 230376960.

The previous prime is 403898113. The next prime is 403898137. The reversal of 403898121 is 121898304.

It can be written as a sum of positive squares in 2 ways, for example, as 294465600 + 109432521 = 17160^2 + 10461^2 .

It is not a de Polignac number, because 403898121 - 2³ = 403898113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (403898171) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7605 + ... + 29421.

It is an arithmetic number, because the mean of its divisors is an integer number (18861661).

Almost surely, 2^403898121 is an apocalyptic number.

It is an amenable number.

403898121 is a deficient number, since it is larger than the sum of its proper divisors (275121675).

403898121 is a wasteful number, since it uses less digits than its factorization.

403898121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21862 (or 21848 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 403898121 is about 20097.2167475997. The cubic root of 403898121 is about 739.1920332900.

The spelling of 403898121 in words is "four hundred three million, eight hundred ninety-eight thousand, one hundred twenty-one".