11561560 has 16 divisors (see below), whose sum is σ = 26013600. Its totient is φ = 4624608.

The previous prime is 11561531. The next prime is 11561591. The reversal of 11561560 is 6516511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144480 + ... + 144559.

It is an arithmetic number, because the mean of its divisors is an integer number (1625850).

Almost surely, 2^11561560 is an apocalyptic number.

11561560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11561560 is an abundant number, since it is smaller than the sum of its proper divisors (14452040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11561560 is a wasteful number, since it uses less digits than its factorization.

11561560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289050 (or 289046 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 11561560 is about 3400.2294040256. The cubic root of 11561560 is about 226.1199144347.

It can be divided in two parts, 11561 and 560, that added together give a palindrome (12121).

The spelling of 11561560 in words is "eleven million, five hundred sixty-one thousand, five hundred sixty".