1161560 has 32 divisors (see below), whose sum is σ = 2656800. Its totient is φ = 456960.

The previous prime is 1161553. The next prime is 1161581. The reversal of 1161560 is 651611.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2636 + ... + 3044.

It is an arithmetic number, because the mean of its divisors is an integer number (83025).

2^1161560 is an apocalyptic number.

1161560 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 1161560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328400).

1161560 is an abundant number, since it is smaller than the sum of its proper divisors (1495240).

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

1161560 is a wasteful number, since it uses less digits than its factorization.

1161560 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 180, while the sum is 20.

The square root of 1161560 is about 1077.7569299244. The cubic root of 1161560 is about 105.1188374840.

The spelling of 1161560 in words is "one million, one hundred sixty-one thousand, five hundred sixty".