3720291 has 4 divisors (see below), whose sum is σ = 4960392. Its totient is φ = 2480192.

The previous prime is 3720253. The next prime is 3720293. The reversal of 3720291 is 1920273.

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 3720291 - 2⁷ = 3720163 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3720293) 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, 620046 + ... + 620051.

It is an arithmetic number, because the mean of its divisors is an integer number (1240098).

Almost surely, 2^3720291 is an apocalyptic number.

3720291 is a deficient number, since it is larger than the sum of its proper divisors (1240101).

3720291 is a wasteful number, since it uses less digits than its factorization.

3720291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240100.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 3720291 is about 1928.8055889591. The cubic root of 3720291 is about 154.9502580589.

The spelling of 3720291 in words is "three million, seven hundred twenty thousand, two hundred ninety-one".