24128945 has 4 divisors (see below), whose sum is σ = 28954740. Its totient is φ = 19303152.

The previous prime is 24128941. The next prime is 24128947. The reversal of 24128945 is 54982142.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54982142 = 2 ⋅27491071.

It can be written as a sum of positive squares in 2 ways, for example, as 4477456 + 19651489 = 2116^2 + 4433^2 .

It is a cyclic number.

It is not a de Polignac number, because 24128945 - 2² = 24128941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (24128941) 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, 2412890 + ... + 2412899.

It is an arithmetic number, because the mean of its divisors is an integer number (7238685).

Almost surely, 2^24128945 is an apocalyptic number.

It is an amenable number.

24128945 is a deficient number, since it is larger than the sum of its proper divisors (4825795).

24128945 is an equidigital number, since it uses as much as digits as its factorization.

24128945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825794.

The product of its digits is 23040, while the sum is 35.

The square root of 24128945 is about 4912.1222501074. The cubic root of 24128945 is about 288.9655774106.

The spelling of 24128945 in words is "twenty-four million, one hundred twenty-eight thousand, nine hundred forty-five".