402131 has 2 divisors, whose sum is σ = 402132. Its totient is φ = 402130.

The previous prime is 402107. The next prime is 402133. The reversal of 402131 is 131204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402131 - 2¹⁸ = 139987 is a prime.

It is a super-2 number, since 2×402131² = 323418682322, which contains 22 as substring.

Together with 402133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201065 + 201066.

It is an arithmetic number, because the mean of its divisors is an integer number (201066).

2⁴⁰²¹³¹ is an apocalyptic number.

402131 is a deficient number, since it is larger than the sum of its proper divisors (1).

402131 is an equidigital number, since it uses as much as digits as its factorization.

402131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 402131 is about 634.1379975999. The cubic root of 402131 is about 73.8112428188.

Adding to 402131 its reverse (131204), we get a palindrome (533335).

The spelling of 402131 in words is "four hundred two thousand, one hundred thirty-one".