3591491 has 4 divisors (see below), whose sum is σ = 3599712. Its totient is φ = 3583272.

The previous prime is 3591487. The next prime is 3591499. The reversal of 3591491 is 1941953.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1941953 = 13 ⋅149381.

It is a cyclic number.

It is not a de Polignac number, because 3591491 - 2² = 3591487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3591499) 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, 3416 + ... + 4341.

It is an arithmetic number, because the mean of its divisors is an integer number (899928).

Almost surely, 2^3591491 is an apocalyptic number.

3591491 is a deficient number, since it is larger than the sum of its proper divisors (8221).

3591491 is an equidigital number, since it uses as much as digits as its factorization.

3591491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8220.

The product of its digits is 4860, while the sum is 32.

The square root of 3591491 is about 1895.1229511565. The cubic root of 3591491 is about 153.1410407186.

The spelling of 3591491 in words is "three million, five hundred ninety-one thousand, four hundred ninety-one".