4987621 has 8 divisors (see below), whose sum is σ = 5177088. Its totient is φ = 4800000.

The previous prime is 4987607. The next prime is 4987627. The reversal of 4987621 is 1267894.

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

It is a 5-Lehmer number, since φ(4987621) divides (4987621-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 4987621 - 2⁵ = 4987589 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 (4987627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7461 + ... + 8101.

It is an arithmetic number, because the mean of its divisors is an integer number (647136).

Almost surely, 2^4987621 is an apocalyptic number.

It is an amenable number.

4987621 is a deficient number, since it is larger than the sum of its proper divisors (189467).

4987621 is a wasteful number, since it uses less digits than its factorization.

4987621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its digits is 24192, while the sum is 37.

The square root of 4987621 is about 2233.2982335550. The cubic root of 4987621 is about 170.8563594318.

The spelling of 4987621 in words is "four million, nine hundred eighty-seven thousand, six hundred twenty-one".