45742409 has 2 divisors, whose sum is σ = 45742410. Its totient is φ = 45742408.

The previous prime is 45742381. The next prime is 45742439. The reversal of 45742409 is 90424754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 10220809 = 5960^2 + 3197^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45742409 is a prime.

It is a super-2 number, since 2×45742409² = 4184735962246562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (45742439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22871204 + 22871205.

It is an arithmetic number, because the mean of its divisors is an integer number (22871205).

Almost surely, 2^45742409 is an apocalyptic number.

It is an amenable number.

45742409 is a deficient number, since it is larger than the sum of its proper divisors (1).

45742409 is an equidigital number, since it uses as much as digits as its factorization.

45742409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 45742409 is about 6763.3134630889. The cubic root of 45742409 is about 357.6347225625.

The spelling of 45742409 in words is "forty-five million, seven hundred forty-two thousand, four hundred nine".