4991421 has 8 divisors (see below), whose sum is σ = 7046784. Its totient is φ = 3131840.

The previous prime is 4991419. The next prime is 4991423. The reversal of 4991421 is 1241994.

4991421 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4991419) and next prime (4991423).

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

It is a cyclic number.

It is not a de Polignac number, because 4991421 - 2¹ = 4991419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48885 + ... + 48986.

It is an arithmetic number, because the mean of its divisors is an integer number (880848).

Almost surely, 2^4991421 is an apocalyptic number.

It is an amenable number.

4991421 is a deficient number, since it is larger than the sum of its proper divisors (2055363).

4991421 is a wasteful number, since it uses less digits than its factorization.

4991421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97891.

The product of its digits is 2592, while the sum is 30.

The square root of 4991421 is about 2234.1488312107. The cubic root of 4991421 is about 170.8997394553.

The spelling of 4991421 in words is "four million, nine hundred ninety-one thousand, four hundred twenty-one".