642474974 has 8 divisors (see below), whose sum is σ = 963842880. Its totient is φ = 321194016.

The previous prime is 642474967. The next prime is 642474977. The reversal of 642474974 is 479474246.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642474977) 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 3 ways as a sum of consecutive naturals, for example, 1862 + ... + 35894.

It is an arithmetic number, because the mean of its divisors is an integer number (120480360).

Almost surely, 2^642474974 is an apocalyptic number.

642474974 is a deficient number, since it is larger than the sum of its proper divisors (321367906).

642474974 is a wasteful number, since it uses less digits than its factorization.

642474974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43474.

The product of its digits is 1354752, while the sum is 47.

The square root of 642474974 is about 25347.0900499446. The cubic root of 642474974 is about 862.8833158343.

The spelling of 642474974 in words is "six hundred forty-two million, four hundred seventy-four thousand, nine hundred seventy-four".