402350257 has 2 divisors, whose sum is σ = 402350258. Its totient is φ = 402350256.

The previous prime is 402350227. The next prime is 402350303. The reversal of 402350257 is 752053204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283888801 + 118461456 = 16849^2 + 10884^2 .

It is a cyclic number.

It is not a de Polignac number, because 402350257 - 2⁷ = 402350129 is a prime.

It is not a weakly prime, because it can be changed into another prime (402350227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201175128 + 201175129.

It is an arithmetic number, because the mean of its divisors is an integer number (201175129).

Almost surely, 2^402350257 is an apocalyptic number.

It is an amenable number.

402350257 is a deficient number, since it is larger than the sum of its proper divisors (1).

402350257 is an equidigital number, since it uses as much as digits as its factorization.

402350257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 402350257 is about 20058.6703696930. The cubic root of 402350257 is about 738.2465527328.

The spelling of 402350257 in words is "four hundred two million, three hundred fifty thousand, two hundred fifty-seven".