402101291 has 2 divisors, whose sum is σ = 402101292. Its totient is φ = 402101290.

The previous prime is 402101281. The next prime is 402101321. The reversal of 402101291 is 192101204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402101291 is a prime.

It is not a weakly prime, because it can be changed into another prime (402101251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201050645 + 201050646.

It is an arithmetic number, because the mean of its divisors is an integer number (201050646).

Almost surely, 2^402101291 is an apocalyptic number.

402101291 is a deficient number, since it is larger than the sum of its proper divisors (1).

402101291 is an equidigital number, since it uses as much as digits as its factorization.

402101291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 402101291 is about 20052.4634646220. The cubic root of 402101291 is about 738.0942507594.

Adding to 402101291 its reverse (192101204), we get a palindrome (594202495).

The spelling of 402101291 in words is "four hundred two million, one hundred one thousand, two hundred ninety-one".