2407981 has 4 divisors (see below), whose sum is σ = 2411100. Its totient is φ = 2404864.

The previous prime is 2407963. The next prime is 2408009. The reversal of 2407981 is 1897042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 184900 + 2223081 = 430^2 + 1491^2 .

It is a cyclic number.

It is not a de Polignac number, because 2407981 - 2⁹ = 2407469 is a prime.

It is a super-2 number, since 2×2407981² = 11596744992722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2407781) 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, 555 + ... + 2263.

It is an arithmetic number, because the mean of its divisors is an integer number (602775).

2^2407981 is an apocalyptic number.

It is an amenable number.

2407981 is a deficient number, since it is larger than the sum of its proper divisors (3119).

2407981 is a wasteful number, since it uses less digits than its factorization.

2407981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2407981 is about 1551.7670572609. The cubic root of 2407981 is about 134.0348353778.

The spelling of 2407981 in words is "two million, four hundred seven thousand, nine hundred eighty-one".