2445981 has 8 divisors (see below), whose sum is σ = 3403200. Its totient is φ = 1559712.

The previous prime is 2445979. The next prime is 2445991. The reversal of 2445981 is 1895442.

2445981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2445981 - 2¹ = 2445979 is a prime.

It is a super-2 number, since 2×2445981² = 11965646104722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2445991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17656 + ... + 17793.

It is an arithmetic number, because the mean of its divisors is an integer number (425400).

2^2445981 is an apocalyptic number.

It is an amenable number.

2445981 is a deficient number, since it is larger than the sum of its proper divisors (957219).

2445981 is a wasteful number, since it uses less digits than its factorization.

2445981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35475.

The product of its digits is 11520, while the sum is 33.

The square root of 2445981 is about 1563.9632348620. The cubic root of 2445981 is about 134.7362201836.

The spelling of 2445981 in words is "two million, four hundred forty-five thousand, nine hundred eighty-one".