642193105 has 16 divisors (see below), whose sum is σ = 820986624. Its totient is φ = 480556800.

The previous prime is 642193087. The next prime is 642193121. The reversal of 642193105 is 501391246.

It is not a de Polignac number, because 642193105 - 2⁷ = 642192977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9321 + ... + 37030.

It is an arithmetic number, because the mean of its divisors is an integer number (51311664).

Almost surely, 2^642193105 is an apocalyptic number.

It is an amenable number.

642193105 is a deficient number, since it is larger than the sum of its proper divisors (178793519).

642193105 is a wasteful number, since it uses less digits than its factorization.

642193105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46536.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 642193105 is about 25341.5292553547. The cubic root of 642193105 is about 862.7571082544.

The spelling of 642193105 in words is "six hundred forty-two million, one hundred ninety-three thousand, one hundred five".