402102281257 has 2 divisors, whose sum is σ = 402102281258. Its totient is φ = 402102281256.

The previous prime is 402102281227. The next prime is 402102281299. The reversal of 402102281257 is 752182201204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233486105616 + 168616175641 = 483204^2 + 410629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402102281257 is a prime.

It is not a weakly prime, because it can be changed into another prime (402102281227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201051140628 + 201051140629.

It is an arithmetic number, because the mean of its divisors is an integer number (201051140629).

Almost surely, 2^402102281257 is an apocalyptic number.

It is an amenable number.

402102281257 is a deficient number, since it is larger than the sum of its proper divisors (1).

402102281257 is an equidigital number, since it uses as much as digits as its factorization.

402102281257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 34.

The spelling of 402102281257 in words is "four hundred two billion, one hundred two million, two hundred eighty-one thousand, two hundred fifty-seven".