642748 has 6 divisors (see below), whose sum is σ = 1124816. Its totient is φ = 321372.

The previous prime is 642739. The next prime is 642769. The reversal of 642748 is 847246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80340 + ... + 80347.

2⁶⁴²⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

642748 is a deficient number, since it is larger than the sum of its proper divisors (482068).

642748 is a wasteful number, since it uses less digits than its factorization.

642748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160691 (or 160689 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 642748 is about 801.7156603185. The cubic root of 642748 is about 86.3005528748.

The spelling of 642748 in words is "six hundred forty-two thousand, seven hundred forty-eight".