2445881 has 2 divisors, whose sum is σ = 2445882. Its totient is φ = 2445880.

The previous prime is 2445857. The next prime is 2445887. The reversal of 2445881 is 1885442.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1731856 + 714025 = 1316^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 2445881 - 2¹⁸ = 2183737 is a prime.

It is a super-2 number, since 2×2445881² = 11964667732322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2445887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1222940 + 1222941.

It is an arithmetic number, because the mean of its divisors is an integer number (1222941).

2^2445881 is an apocalyptic number.

It is an amenable number.

2445881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2445881 is an equidigital number, since it uses as much as digits as its factorization.

2445881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10240, while the sum is 32.

The square root of 2445881 is about 1563.9312644742. The cubic root of 2445881 is about 134.7343840007.

The spelling of 2445881 in words is "two million, four hundred forty-five thousand, eight hundred eighty-one".