22451245 has 4 divisors (see below), whose sum is σ = 26941500. Its totient is φ = 17960992.

The previous prime is 22451213. The next prime is 22451257. The reversal of 22451245 is 54215422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54215422 = 2 ⋅27107711.

It can be written as a sum of positive squares in 2 ways, for example, as 7851204 + 14600041 = 2802^2 + 3821^2 .

It is a cyclic number.

It is not a de Polignac number, because 22451245 - 2⁵ = 22451213 is a prime.

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, 2245120 + ... + 2245129.

It is an arithmetic number, because the mean of its divisors is an integer number (6735375).

Almost surely, 2^22451245 is an apocalyptic number.

It is an amenable number.

22451245 is a deficient number, since it is larger than the sum of its proper divisors (4490255).

22451245 is an equidigital number, since it uses as much as digits as its factorization.

22451245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490254.

The product of its digits is 3200, while the sum is 25.

The square root of 22451245 is about 4738.2744749539. The cubic root of 22451245 is about 282.1067491503.

Adding to 22451245 its reverse (54215422), we get a palindrome (76666667).

The spelling of 22451245 in words is "twenty-two million, four hundred fifty-one thousand, two hundred forty-five".