561249271 has 12 divisors (see below), whose sum is σ = 650410200. Its totient is φ = 480210560.

The previous prime is 561249253. The next prime is 561249281. The reversal of 561249271 is 172942165.

It is not a de Polignac number, because 561249271 - 2⁹ = 561248759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561249271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561249281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85096 + ... + 91453.

It is an arithmetic number, because the mean of its divisors is an integer number (54200850).

Almost surely, 2^561249271 is an apocalyptic number.

561249271 is a deficient number, since it is larger than the sum of its proper divisors (89160929).

561249271 is a wasteful number, since it uses less digits than its factorization.

561249271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176594 (or 176577 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 561249271 is about 23690.7000951850. The cubic root of 561249271 is about 824.8695335777.

The spelling of 561249271 in words is "five hundred sixty-one million, two hundred forty-nine thousand, two hundred seventy-one".