45842509 has 4 divisors (see below), whose sum is σ = 46707516. Its totient is φ = 44977504.

The previous prime is 45842479. The next prime is 45842513. The reversal of 45842509 is 90524854.

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 31326409 + 14516100 = 5597^2 + 3810^2 .

It is a cyclic number.

It is not a de Polignac number, because 45842509 - 2¹³ = 45834317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45842579) 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, 432424 + ... + 432529.

It is an arithmetic number, because the mean of its divisors is an integer number (11676879).

Almost surely, 2^45842509 is an apocalyptic number.

It is an amenable number.

45842509 is a deficient number, since it is larger than the sum of its proper divisors (865007).

45842509 is an equidigital number, since it uses as much as digits as its factorization.

45842509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865006.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 45842509 is about 6770.7096378445. The cubic root of 45842509 is about 357.8954081025.

The spelling of 45842509 in words is "forty-five million, eight hundred forty-two thousand, five hundred nine".