45409405 has 4 divisors (see below), whose sum is σ = 54491292. Its totient is φ = 36327520.

The previous prime is 45409391. The next prime is 45409439. The reversal of 45409405 is 50490454.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8964036 + 36445369 = 2994^2 + 6037^2 .

It is not a de Polignac number, because 45409405 - 2¹⁵ = 45376637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4540936 + ... + 4540945.

It is an arithmetic number, because the mean of its divisors is an integer number (13622823).

Almost surely, 2^45409405 is an apocalyptic number.

It is an amenable number.

45409405 is a deficient number, since it is larger than the sum of its proper divisors (9081887).

45409405 is an equidigital number, since it uses as much as digits as its factorization.

45409405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9081886.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 45409405 is about 6738.6500873691. The cubic root of 45409405 is about 356.7647496671.

Adding to 45409405 its reverse (50490454), we get a palindrome (95899859).

The spelling of 45409405 in words is "forty-five million, four hundred nine thousand, four hundred five".