11431560 has 128 divisors (see below), whose sum is σ = 40550400. Its totient is φ = 2522880.

The previous prime is 11431549. The next prime is 11431561. The reversal of 11431560 is 6513411.

11431560 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

11431560 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (11431561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25821 + ... + 26259.

It is an arithmetic number, because the mean of its divisors is an integer number (316800).

Almost surely, 2^11431560 is an apocalyptic number.

11431560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11431560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20275200).

11431560 is an abundant number, since it is smaller than the sum of its proper divisors (29118840).

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

11431560 is a wasteful number, since it uses less digits than its factorization.

11431560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 11431560 is about 3381.0590056963. The cubic root of 11431560 is about 225.2692086322.

Adding to 11431560 its reverse (6513411), we get a palindrome (17944971).

The spelling of 11431560 in words is "eleven million, four hundred thirty-one thousand, five hundred sixty".