402121151 has 2 divisors, whose sum is σ = 402121152. Its totient is φ = 402121150.

The previous prime is 402121147. The next prime is 402121189. The reversal of 402121151 is 151121204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402121151 - 2² = 402121147 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402120151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201060575 + 201060576.

It is an arithmetic number, because the mean of its divisors is an integer number (201060576).

Almost surely, 2^402121151 is an apocalyptic number.

402121151 is a deficient number, since it is larger than the sum of its proper divisors (1).

402121151 is an equidigital number, since it uses as much as digits as its factorization.

402121151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 402121151 is about 20052.9586595096. The cubic root of 402121151 is about 738.1064021839.

Adding to 402121151 its reverse (151121204), we get a palindrome (553242355).

The spelling of 402121151 in words is "four hundred two million, one hundred twenty-one thousand, one hundred fifty-one".