79281261 has 20 divisors (see below), whose sum is σ = 119245500. Its totient is φ = 52491456.

The previous prime is 79281247. The next prime is 79281311. The reversal of 79281261 is 16218297.

It can be written as a sum of positive squares in 2 ways, for example, as 40717161 + 38564100 = 6381^2 + 6210^2 .

It is not a de Polignac number, because 79281261 - 2⁶ = 79281197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79281361) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8785 + ... + 15353.

It is an arithmetic number, because the mean of its divisors is an integer number (5962275).

Almost surely, 2^79281261 is an apocalyptic number.

It is an amenable number.

79281261 is a deficient number, since it is larger than the sum of its proper divisors (39964239).

79281261 is a wasteful number, since it uses less digits than its factorization.

79281261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6730 (or 6721 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 79281261 is about 8904.0025269538. The cubic root of 79281261 is about 429.5926573290.

The spelling of 79281261 in words is "seventy-nine million, two hundred eighty-one thousand, two hundred sixty-one".