561269 has 6 divisors (see below), whose sum is σ = 587286. Its totient is φ = 536360.

The previous prime is 561251. The next prime is 561277. The reversal of 561269 is 962165.

It can be written as a sum of positive squares in only one way, i.e., 508369 + 52900 = 713^2 + 230^2 .

It is a de Polignac number, because none of the positive numbers 2^k-561269 is a prime.

It is a super-2 number, since 2×561269² = 630045780722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2 + ... + 1059.

It is an arithmetic number, because the mean of its divisors is an integer number (97881).

2⁵⁶¹²⁶⁹ is an apocalyptic number.

It is an amenable number.

561269 is a deficient number, since it is larger than the sum of its proper divisors (26017).

561269 is a wasteful number, since it uses less digits than its factorization.

561269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1084 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 561269 is about 749.1788838455. The cubic root of 561269 is about 82.4879198719.

The spelling of 561269 in words is "five hundred sixty-one thousand, two hundred sixty-nine".