642652051 has 2 divisors, whose sum is σ = 642652052. Its totient is φ = 642652050.

The previous prime is 642651983. The next prime is 642652079. The reversal of 642652051 is 150256246.

642652051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642652051 - 2²⁹ = 105781139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (642652091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321326025 + 321326026.

It is an arithmetic number, because the mean of its divisors is an integer number (321326026).

Almost surely, 2^642652051 is an apocalyptic number.

642652051 is a deficient number, since it is larger than the sum of its proper divisors (1).

642652051 is an equidigital number, since it uses as much as digits as its factorization.

642652051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 642652051 is about 25350.5828532600. The cubic root of 642652051 is about 862.9625836447.

The spelling of 642652051 in words is "six hundred forty-two million, six hundred fifty-two thousand, fifty-one".