4721191 has 4 divisors (see below), whose sum is σ = 4836384. Its totient is φ = 4606000.

The previous prime is 4721179. The next prime is 4721201. The reversal of 4721191 is 1911274.

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 4721191 - 2¹⁹ = 4196903 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 (4721491) 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, 57535 + ... + 57616.

It is an arithmetic number, because the mean of its divisors is an integer number (1209096).

Almost surely, 2^4721191 is an apocalyptic number.

4721191 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

4721191 is a deficient number, since it is larger than the sum of its proper divisors (115193).

4721191 is a wasteful number, since it uses less digits than its factorization.

4721191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115192.

The product of its digits is 504, while the sum is 25.

The square root of 4721191 is about 2172.8301820437. The cubic root of 4721191 is about 167.7582383313.

The spelling of 4721191 in words is "four million, seven hundred twenty-one thousand, one hundred ninety-one".