3721191 has 8 divisors (see below), whose sum is σ = 4971120. Its totient is φ = 2476032.

The previous prime is 3721171. The next prime is 3721199. The reversal of 3721191 is 1911273.

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

It is not a de Polignac number, because 3721191 - 2⁷ = 3721063 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721199) 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, 1501 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (621390).

Almost surely, 2^3721191 is an apocalyptic number.

3721191 is a deficient number, since it is larger than the sum of its proper divisors (1249929).

3721191 is a wasteful number, since it uses less digits than its factorization.

3721191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385.

The product of its digits is 378, while the sum is 24.

The square root of 3721191 is about 1929.0388798570. The cubic root of 3721191 is about 154.9627520625.

The spelling of 3721191 in words is "three million, seven hundred twenty-one thousand, one hundred ninety-one".