402102157 has 2 divisors, whose sum is σ = 402102158. Its totient is φ = 402102156.

The previous prime is 402102133. The next prime is 402102167. The reversal of 402102157 is 751201204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315630756 + 86471401 = 17766^2 + 9299^2 .

It is a cyclic number.

It is not a de Polignac number, because 402102157 - 2¹⁵ = 402069389 is a prime.

It is a super-2 number, since 2×402102157² = 323372289328105298, which contains 22 as substring.

It is equal to p_21442324 and since 402102157 and 21442324 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402102167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201051078 + 201051079.

It is an arithmetic number, because the mean of its divisors is an integer number (201051079).

Almost surely, 2^402102157 is an apocalyptic number.

It is an amenable number.

402102157 is a deficient number, since it is larger than the sum of its proper divisors (1).

402102157 is an equidigital number, since it uses as much as digits as its factorization.

402102157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 402102157 is about 20052.4850579673. The cubic root of 402102157 is about 738.0947806334.

The spelling of 402102157 in words is "four hundred two million, one hundred two thousand, one hundred fifty-seven".