642112485 has 32 divisors (see below), whose sum is σ = 1188311040. Its totient is φ = 289996608.

The previous prime is 642112477. The next prime is 642112487. The reversal of 642112485 is 584211246.

It is a happy number.

It is not a de Polignac number, because 642112485 - 2³ = 642112477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642112487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28125 + ... + 45554.

It is an arithmetic number, because the mean of its divisors is an integer number (37134720).

Almost surely, 2^642112485 is an apocalyptic number.

It is an amenable number.

642112485 is a deficient number, since it is larger than the sum of its proper divisors (546198555).

642112485 is a wasteful number, since it uses less digits than its factorization.

642112485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73777.

The product of its digits is 15360, while the sum is 33.

The square root of 642112485 is about 25339.9385358371. The cubic root of 642112485 is about 862.7210036475.

The spelling of 642112485 in words is "six hundred forty-two million, one hundred twelve thousand, four hundred eighty-five".