642134445 has 64 divisors (see below), whose sum is σ = 1092648960. Its totient is φ = 321608448.

The previous prime is 642134429. The next prime is 642134453. The reversal of 642134445 is 544431246.

It is a happy number.

It is not a de Polignac number, because 642134445 - 2⁴ = 642134429 is a prime.

It is a super-3 number, since 3×642134445³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2686636 + ... + 2686874.

It is an arithmetic number, because the mean of its divisors is an integer number (17072640).

Almost surely, 2^642134445 is an apocalyptic number.

It is an amenable number.

642134445 is a deficient number, since it is larger than the sum of its proper divisors (450514515).

642134445 is a wasteful number, since it uses less digits than its factorization.

642134445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434.

The product of its digits is 46080, while the sum is 33.

The square root of 642134445 is about 25340.3718402079. The cubic root of 642134445 is about 862.7308384442.

The spelling of 642134445 in words is "six hundred forty-two million, one hundred thirty-four thousand, four hundred forty-five".