4986921 has 4 divisors (see below), whose sum is σ = 6649232. Its totient is φ = 3324612.

The previous prime is 4986913. The next prime is 4986923. The reversal of 4986921 is 1296894.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4986921 - 2³ = 4986913 is a prime.

It is a D-number.

It is a Duffinian number.

4986921 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4986921.

It is not an unprimeable number, because it can be changed into a prime (4986923) 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, 831151 + ... + 831156.

It is an arithmetic number, because the mean of its divisors is an integer number (1662308).

Almost surely, 2^4986921 is an apocalyptic number.

It is an amenable number.

4986921 is a deficient number, since it is larger than the sum of its proper divisors (1662311).

4986921 is a wasteful number, since it uses less digits than its factorization.

4986921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662310.

The product of its digits is 31104, while the sum is 39.

The square root of 4986921 is about 2233.1415091749. The cubic root of 4986921 is about 170.8483659717.

The spelling of 4986921 in words is "four million, nine hundred eighty-six thousand, nine hundred twenty-one".