45409251 has 4 divisors (see below), whose sum is σ = 60545672. Its totient is φ = 30272832.

The previous prime is 45409241. The next prime is 45409253. The reversal of 45409251 is 15290454.

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

It is not a de Polignac number, because 45409251 - 2⁷ = 45409123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45409253) 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, 7568206 + ... + 7568211.

It is an arithmetic number, because the mean of its divisors is an integer number (15136418).

Almost surely, 2^45409251 is an apocalyptic number.

45409251 is a deficient number, since it is larger than the sum of its proper divisors (15136421).

45409251 is a wasteful number, since it uses less digits than its factorization.

45409251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15136420.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 45409251 is about 6738.6386607385. The cubic root of 45409251 is about 356.7643463598.

The spelling of 45409251 in words is "forty-five million, four hundred nine thousand, two hundred fifty-one".