45724459 has 4 divisors (see below), whose sum is σ = 49881240. Its totient is φ = 41567680.

The previous prime is 45724423. The next prime is 45724463. The reversal of 45724459 is 95442754.

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

It is not a de Polignac number, because 45724459 - 2⁹ = 45723947 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45724409) 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, 2078374 + ... + 2078395.

It is an arithmetic number, because the mean of its divisors is an integer number (12470310).

Almost surely, 2^45724459 is an apocalyptic number.

45724459 is a deficient number, since it is larger than the sum of its proper divisors (4156781).

45724459 is a wasteful number, since it uses less digits than its factorization.

45724459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156780.

The product of its digits is 201600, while the sum is 40.

The square root of 45724459 is about 6761.9863206014. The cubic root of 45724459 is about 357.5879360515.

The spelling of 45724459 in words is "forty-five million, seven hundred twenty-four thousand, four hundred fifty-nine".