403152021 has 12 divisors (see below), whose sum is σ = 587485548. Its totient is φ = 266388864.

The previous prime is 403152017. The next prime is 403152023. The reversal of 403152021 is 120251304.

It can be written as a sum of positive squares in 2 ways, for example, as 104346225 + 298805796 = 10215^2 + 17286^2 .

It is not a de Polignac number, because 403152021 - 2² = 403152017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 403151985 and 403152003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403152023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197190 + ... + 199223.

It is an arithmetic number, because the mean of its divisors is an integer number (48957129).

Almost surely, 2^403152021 is an apocalyptic number.

It is an amenable number.

403152021 is a deficient number, since it is larger than the sum of its proper divisors (184333527).

403152021 is a wasteful number, since it uses less digits than its factorization.

403152021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396532 (or 396529 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 403152021 is about 20078.6458955777. The cubic root of 403152021 is about 738.7365957354.

The spelling of 403152021 in words is "four hundred three million, one hundred fifty-two thousand, twenty-one".