45420491 has 2 divisors, whose sum is σ = 45420492. Its totient is φ = 45420490.

The previous prime is 45420457. The next prime is 45420499. The reversal of 45420491 is 19402454.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45420491 is a prime.

It is not a weakly prime, because it can be changed into another prime (45420499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22710245 + 22710246.

It is an arithmetic number, because the mean of its divisors is an integer number (22710246).

Almost surely, 2^45420491 is an apocalyptic number.

45420491 is a deficient number, since it is larger than the sum of its proper divisors (1).

45420491 is an equidigital number, since it uses as much as digits as its factorization.

45420491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 45420491 is about 6739.4726054789. The cubic root of 45420491 is about 356.7937801598.

The spelling of 45420491 in words is "forty-five million, four hundred twenty thousand, four hundred ninety-one".