2536981 has 4 divisors (see below), whose sum is σ = 2543200. Its totient is φ = 2530764.

The previous prime is 2536943. The next prime is 2536991. The reversal of 2536981 is 1896352.

2536981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2536981 - 2¹⁵ = 2504213 is a prime.

It is a super-2 number, since 2×2536981² = 12872545188722, which contains 22 as substring.

It is a Duffinian number.

2536981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2536921) 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 3 ways as a sum of consecutive naturals, for example, 2451 + ... + 3328.

It is an arithmetic number, because the mean of its divisors is an integer number (635800).

2^2536981 is an apocalyptic number.

It is an amenable number.

2536981 is a deficient number, since it is larger than the sum of its proper divisors (6219).

2536981 is an equidigital number, since it uses as much as digits as its factorization.

2536981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6218.

The product of its digits is 12960, while the sum is 34.

The square root of 2536981 is about 1592.7903189058. The cubic root of 2536981 is about 136.3868204487.

The spelling of 2536981 in words is "two million, five hundred thirty-six thousand, nine hundred eighty-one".