2508981 has 4 divisors (see below), whose sum is σ = 3345312. Its totient is φ = 1672652.

The previous prime is 2508971. The next prime is 2509027. The reversal of 2508981 is 1898052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2508981 - 2⁶ = 2508917 is a prime.

It is a super-2 number, since 2×2508981² = 12589971316722, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2508901) 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, 418161 + ... + 418166.

It is an arithmetic number, because the mean of its divisors is an integer number (836328).

2^2508981 is an apocalyptic number.

It is an amenable number.

2508981 is a deficient number, since it is larger than the sum of its proper divisors (836331).

2508981 is an equidigital number, since it uses as much as digits as its factorization.

2508981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836330.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 2508981 is about 1583.9763255807. The cubic root of 2508981 is about 135.8832078342.

The spelling of 2508981 in words is "two million, five hundred eight thousand, nine hundred eighty-one".