642468237 has 16 divisors (see below), whose sum is σ = 878764992. Its totient is φ = 417271680.

The previous prime is 642468227. The next prime is 642468251. The reversal of 642468237 is 732864246.

It is not a de Polignac number, because 642468237 - 2²⁰ = 641419661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642468227) 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, 93483 + ... + 100119.

It is an arithmetic number, because the mean of its divisors is an integer number (54922812).

Almost surely, 2^642468237 is an apocalyptic number.

It is an amenable number.

642468237 is a deficient number, since it is larger than the sum of its proper divisors (236296755).

642468237 is a wasteful number, since it uses less digits than its factorization.

642468237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468.

The product of its digits is 387072, while the sum is 42.

The square root of 642468237 is about 25346.9571546567. The cubic root of 642468237 is about 862.8802997556.

The spelling of 642468237 in words is "six hundred forty-two million, four hundred sixty-eight thousand, two hundred thirty-seven".