561272 has 16 divisors (see below), whose sum is σ = 1114560. Its totient is φ = 264064.

The previous prime is 561251. The next prime is 561277. The reversal of 561272 is 272165.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928 + ... + 2199.

It is an arithmetic number, because the mean of its divisors is an integer number (69660).

2⁵⁶¹²⁷² is an apocalyptic number.

It is an amenable number.

561272 is a deficient number, since it is larger than the sum of its proper divisors (553288).

561272 is a wasteful number, since it uses less digits than its factorization.

561272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150 (or 4146 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 561272 is about 749.1808860349. The cubic root of 561272 is about 82.4880668385.

The spelling of 561272 in words is "five hundred sixty-one thousand, two hundred seventy-two".