642462511 has 2 divisors, whose sum is σ = 642462512. Its totient is φ = 642462510.

The previous prime is 642462481. The next prime is 642462559. The reversal of 642462511 is 115264246.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642462511 - 2⁵ = 642462479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642462571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321231255 + 321231256.

It is an arithmetic number, because the mean of its divisors is an integer number (321231256).

Almost surely, 2^642462511 is an apocalyptic number.

642462511 is a deficient number, since it is larger than the sum of its proper divisors (1).

642462511 is an equidigital number, since it uses as much as digits as its factorization.

642462511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 642462511 is about 25346.8442019909. The cubic root of 642462511 is about 862.8777362737.

The spelling of 642462511 in words is "six hundred forty-two million, four hundred sixty-two thousand, five hundred eleven".