402314021 has 2 divisors, whose sum is σ = 402314022. Its totient is φ = 402314020.

The previous prime is 402313943. The next prime is 402314039. The reversal of 402314021 is 120413204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242923396 + 159390625 = 15586^2 + 12625^2 .

It is a cyclic number.

It is not a de Polignac number, because 402314021 - 2¹⁸ = 402051877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402314041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201157010 + 201157011.

It is an arithmetic number, because the mean of its divisors is an integer number (201157011).

Almost surely, 2^402314021 is an apocalyptic number.

It is an amenable number.

402314021 is a deficient number, since it is larger than the sum of its proper divisors (1).

402314021 is an equidigital number, since it uses as much as digits as its factorization.

402314021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 402314021 is about 20057.7670990567. The cubic root of 402314021 is about 738.2243897005.

Adding to 402314021 its reverse (120413204), we get a palindrome (522727225).

The spelling of 402314021 in words is "four hundred two million, three hundred fourteen thousand, twenty-one".