13745491 has 2 divisors, whose sum is σ = 13745492. Its totient is φ = 13745490.

The previous prime is 13745489. The next prime is 13745521. The reversal of 13745491 is 19454731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13745491 - 2¹ = 13745489 is a prime.

Together with 13745489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13745461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6872745 + 6872746.

It is an arithmetic number, because the mean of its divisors is an integer number (6872746).

Almost surely, 2^13745491 is an apocalyptic number.

13745491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13745491 is an equidigital number, since it uses as much as digits as its factorization.

13745491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 13745491 is about 3707.4912002593. The cubic root of 13745491 is about 239.5448027027.

The spelling of 13745491 in words is "thirteen million, seven hundred forty-five thousand, four hundred ninety-one".