2400981 has 16 divisors (see below), whose sum is σ = 3606528. Its totient is φ = 1407600.

The previous prime is 2400971. The next prime is 2400989. The reversal of 2400981 is 1890042.

It is not a de Polignac number, because 2400981 - 2⁵ = 2400949 is a prime.

It is a super-2 number, since 2×2400981² = 11529419524722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151 + ... + 2196.

It is an arithmetic number, because the mean of its divisors is an integer number (225408).

2^2400981 is an apocalyptic number.

It is an amenable number.

2400981 is a deficient number, since it is larger than the sum of its proper divisors (1205547).

2400981 is a wasteful number, since it uses less digits than its factorization.

2400981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2400981 is about 1549.5099225239. The cubic root of 2400981 is about 133.9048295794.

It can be divided in two parts, 24009 and 81, that added together give a triangular number (24090 = T₂₁₉).

The spelling of 2400981 in words is "two million, four hundred thousand, nine hundred eighty-one".