4642639 has 4 divisors (see below), whose sum is σ = 4802760. Its totient is φ = 4482520.

The previous prime is 4642621. The next prime is 4642643. The reversal of 4642639 is 9362464.

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 4642639 - 2⁵ = 4642607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4642609) 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, 80017 + ... + 80074.

It is an arithmetic number, because the mean of its divisors is an integer number (1200690).

Almost surely, 2^4642639 is an apocalyptic number.

4642639 is a deficient number, since it is larger than the sum of its proper divisors (160121).

4642639 is a wasteful number, since it uses less digits than its factorization.

4642639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160120.

The product of its digits is 31104, while the sum is 34.

The square root of 4642639 is about 2154.6783982766. The cubic root of 4642639 is about 166.8226331124.

The spelling of 4642639 in words is "four million, six hundred forty-two thousand, six hundred thirty-nine".