4013591 has 2 divisors, whose sum is σ = 4013592. Its totient is φ = 4013590.

The previous prime is 4013573. The next prime is 4013621. The reversal of 4013591 is 1953104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4013591 is a prime.

It is a super-2 number, since 2×4013591² = 32217825430562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4013521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006795 + 2006796.

It is an arithmetic number, because the mean of its divisors is an integer number (2006796).

Almost surely, 2^4013591 is an apocalyptic number.

4013591 is a deficient number, since it is larger than the sum of its proper divisors (1).

4013591 is an equidigital number, since it uses as much as digits as its factorization.

4013591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 4013591 is about 2003.3948687166. The cubic root of 4013591 is about 158.9196883547.

Adding to 4013591 its reverse (1953104), we get a palindrome (5966695).

It can be divided in two parts, 40 and 13591, that added together give a palindrome (13631).

The spelling of 4013591 in words is "four million, thirteen thousand, five hundred ninety-one".