45115409 has 2 divisors, whose sum is σ = 45115410. Its totient is φ = 45115408.

The previous prime is 45115391. The next prime is 45115429. The reversal of 45115409 is 90451154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28890625 + 16224784 = 5375^2 + 4028^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45115409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45115429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22557704 + 22557705.

It is an arithmetic number, because the mean of its divisors is an integer number (22557705).

Almost surely, 2^45115409 is an apocalyptic number.

It is an amenable number.

45115409 is a deficient number, since it is larger than the sum of its proper divisors (1).

45115409 is an equidigital number, since it uses as much as digits as its factorization.

45115409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 45115409 is about 6716.8005032158. The cubic root of 45115409 is about 355.9931430948.

The spelling of 45115409 in words is "forty-five million, one hundred fifteen thousand, four hundred nine".