642450455 has 8 divisors (see below), whose sum is σ = 777011712. Its totient is φ = 509912928.

The previous prime is 642450433. The next prime is 642450481. The reversal of 642450455 is 554054246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642450455 - 2²⁰ = 641401879 is a prime.

It is a Duffinian number.

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, 505232 + ... + 506501.

It is an arithmetic number, because the mean of its divisors is an integer number (97126464).

Almost surely, 2^642450455 is an apocalyptic number.

642450455 is a deficient number, since it is larger than the sum of its proper divisors (134561257).

642450455 is a wasteful number, since it uses less digits than its factorization.

642450455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011865.

The product of its (nonzero) digits is 96000, while the sum is 35.

The square root of 642450455 is about 25346.6063803421. The cubic root of 642450455 is about 862.8723388541.

The spelling of 642450455 in words is "six hundred forty-two million, four hundred fifty thousand, four hundred fifty-five".