45509405 has 4 divisors (see below), whose sum is σ = 54611292. Its totient is φ = 36407520.

The previous prime is 45509383. The next prime is 45509407. The reversal of 45509405 is 50490554.

It is a happy number.

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 35485849 + 10023556 = 5957^2 + 3166^2 .

It is not a de Polignac number, because 45509405 - 2²⁴ = 28732189 is a prime.

It is a super-2 number, since 2×45509405² = 4142211886908050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45509407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4550936 + ... + 4550945.

It is an arithmetic number, because the mean of its divisors is an integer number (13652823).

Almost surely, 2^45509405 is an apocalyptic number.

It is an amenable number.

45509405 is a deficient number, since it is larger than the sum of its proper divisors (9101887).

45509405 is an equidigital number, since it uses as much as digits as its factorization.

45509405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9101886.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 45509405 is about 6746.0658905765. The cubic root of 45509405 is about 357.0264452212.

Adding to 45509405 its reverse (50490554), we get a palindrome (95999959).

The spelling of 45509405 in words is "forty-five million, five hundred nine thousand, four hundred five".