45012491 has 2 divisors, whose sum is σ = 45012492. Its totient is φ = 45012490.

The previous prime is 45012479. The next prime is 45012523. The reversal of 45012491 is 19421054.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45012491 - 2⁶ = 45012427 is a prime.

It is a super-2 number, since 2×45012491² = 4052248692050162, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45012491.

It is not a weakly prime, because it can be changed into another prime (45212491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22506245 + 22506246.

It is an arithmetic number, because the mean of its divisors is an integer number (22506246).

Almost surely, 2^45012491 is an apocalyptic number.

45012491 is a deficient number, since it is larger than the sum of its proper divisors (1).

45012491 is an equidigital number, since it uses as much as digits as its factorization.

45012491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 45012491 is about 6709.1348920707. The cubic root of 45012491 is about 355.7222378890.

The spelling of 45012491 in words is "forty-five million, twelve thousand, four hundred ninety-one".