7981261 has 4 divisors (see below), whose sum is σ = 8011872. Its totient is φ = 7950652.

The previous prime is 7981247. The next prime is 7981283. The reversal of 7981261 is 1621897.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1621897 = 19 ⋅85363.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7981261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981231) 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 3 ways as a sum of consecutive naturals, for example, 14911 + ... + 15436.

It is an arithmetic number, because the mean of its divisors is an integer number (2002968).

Almost surely, 2^7981261 is an apocalyptic number.

It is an amenable number.

7981261 is a deficient number, since it is larger than the sum of its proper divisors (30611).

7981261 is a wasteful number, since it uses less digits than its factorization.

7981261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30610.

The product of its digits is 6048, while the sum is 34.

The square root of 7981261 is about 2825.1125641291. The cubic root of 7981261 is about 199.8437195806.

The spelling of 7981261 in words is "seven million, nine hundred eighty-one thousand, two hundred sixty-one".