6402157 has 2 divisors, whose sum is σ = 6402158. Its totient is φ = 6402156.

The previous prime is 6402139. The next prime is 6402161. The reversal of 6402157 is 7512046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5248681 + 1153476 = 2291^2 + 1074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6402157 is a prime.

It is a super-2 number, since 2×6402157² = 81975228505298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6402167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201078 + 3201079.

It is an arithmetic number, because the mean of its divisors is an integer number (3201079).

Almost surely, 2^6402157 is an apocalyptic number.

It is an amenable number.

6402157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6402157 is an equidigital number, since it uses as much as digits as its factorization.

6402157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 6402157 is about 2530.2484067775. The cubic root of 6402157 is about 185.6844091415.

The spelling of 6402157 in words is "six million, four hundred two thousand, one hundred fifty-seven".