2610981 has 8 divisors (see below), whose sum is σ = 3868160. Its totient is φ = 1740636.

The previous prime is 2610977. The next prime is 2610989. The reversal of 2610981 is 1890162.

It is not a de Polignac number, because 2610981 - 2² = 2610977 is a prime.

It is a super-2 number, since 2×2610981² = 13634443564722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 96703 = 2610981 / (2 + 6 + 1 + 0 + 9 + 8 + 1).

It is an Ulam number.

It is a Duffinian number.

2610981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2610989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48325 + ... + 48378.

It is an arithmetic number, because the mean of its divisors is an integer number (483520).

2^2610981 is an apocalyptic number.

It is an amenable number.

2610981 is a deficient number, since it is larger than the sum of its proper divisors (1257179).

2610981 is an equidigital number, since it uses as much as digits as its factorization.

2610981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96712 (or 96706 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2610981 is about 1615.8530254946. The cubic root of 2610981 is about 137.7001998279.

The spelling of 2610981 in words is "two million, six hundred ten thousand, nine hundred eighty-one".