642926535 has 16 divisors (see below), whose sum is σ = 1053773280. Its totient is φ = 334530560.

The previous prime is 642926533. The next prime is 642926561. The reversal of 642926535 is 535629246.

It is a happy number.

642926535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642926535 - 2¹ = 642926533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642926533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522090 + ... + 523319.

It is an arithmetic number, because the mean of its divisors is an integer number (65860830).

Almost surely, 2^642926535 is an apocalyptic number.

642926535 is a deficient number, since it is larger than the sum of its proper divisors (410846745).

642926535 is a wasteful number, since it uses less digits than its factorization.

642926535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045458.

The product of its digits is 388800, while the sum is 42.

The square root of 642926535 is about 25355.9960364408. The cubic root of 642926535 is about 863.0854265352.

The spelling of 642926535 in words is "six hundred forty-two million, nine hundred twenty-six thousand, five hundred thirty-five".