45491 has 2 divisors, whose sum is σ = 45492. Its totient is φ = 45490.

The previous prime is 45481. The next prime is 45497. The reversal of 45491 is 19454.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45491 - 2⁶ = 45427 is a prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (45497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22745 + 22746.

It is an arithmetic number, because the mean of its divisors is an integer number (22746).

2⁴⁵⁴⁹¹ is an apocalyptic number.

45491 is a deficient number, since it is larger than the sum of its proper divisors (1).

45491 is an equidigital number, since it uses as much as digits as its factorization.

45491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 45491 is about 213.2861927083. The cubic root of 45491 is about 35.6978308960.

It can be divided in two parts, 454 and 91, that multiplied together give a palindrome (41314).

The spelling of 45491 in words is "forty-five thousand, four hundred ninety-one".