4990642 has 4 divisors (see below), whose sum is σ = 7485966. Its totient is φ = 2495320.

The previous prime is 4990637. The next prime is 4990649. The reversal of 4990642 is 2460994.

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

It can be written as a sum of positive squares in only one way, i.e., 4968441 + 22201 = 2229^2 + 149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4990598 and 4990607.

It is not an unprimeable number, because it can be changed into a prime (4990649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1247659 + ... + 1247662.

Almost surely, 2^4990642 is an apocalyptic number.

4990642 is a deficient number, since it is larger than the sum of its proper divisors (2495324).

4990642 is a wasteful number, since it uses less digits than its factorization.

4990642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495323.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 4990642 is about 2233.9744850826. The cubic root of 4990642 is about 170.8908483451.

The spelling of 4990642 in words is "four million, nine hundred ninety thousand, six hundred forty-two".