642263254 has 16 divisors (see below), whose sum is σ = 968803920. Its totient is φ = 319334400.

The previous prime is 642263243. The next prime is 642263269. The reversal of 642263254 is 452362246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302902 + ... + 305014.

It is an arithmetic number, because the mean of its divisors is an integer number (60550245).

Almost surely, 2^642263254 is an apocalyptic number.

642263254 is a deficient number, since it is larger than the sum of its proper divisors (326540666).

642263254 is a wasteful number, since it uses less digits than its factorization.

642263254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895.

The product of its digits is 69120, while the sum is 34.

The square root of 642263254 is about 25342.9132895174. The cubic root of 642263254 is about 862.7885211033.

The spelling of 642263254 in words is "six hundred forty-two million, two hundred sixty-three thousand, two hundred fifty-four".