642158059 has 4 divisors (see below), whose sum is σ = 643311504. Its totient is φ = 641004616.

The previous prime is 642158053. The next prime is 642158063. The reversal of 642158059 is 950851246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642158059 - 2⁷ = 642157931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642158053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575887 + ... + 577000.

It is an arithmetic number, because the mean of its divisors is an integer number (160827876).

Almost surely, 2^642158059 is an apocalyptic number.

642158059 is a deficient number, since it is larger than the sum of its proper divisors (1153445).

642158059 is a wasteful number, since it uses less digits than its factorization.

642158059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153444.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 642158059 is about 25340.8377722600. The cubic root of 642158059 is about 862.7414137354.

The spelling of 642158059 in words is "six hundred forty-two million, one hundred fifty-eight thousand, fifty-nine".