1161520 has 20 divisors (see below), whose sum is σ = 2700720. Its totient is φ = 464576.

The previous prime is 1161509. The next prime is 1161521. The reversal of 1161520 is 251611.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1161494 and 1161503.

It is not an unprimeable number, because it can be changed into a prime (1161521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7180 + ... + 7339.

It is an arithmetic number, because the mean of its divisors is an integer number (135036).

2^1161520 is an apocalyptic number.

1161520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161520 is an abundant number, since it is smaller than the sum of its proper divisors (1539200).

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

1161520 is a wasteful number, since it uses less digits than its factorization.

1161520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14532 (or 14526 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1161520 is about 1077.7383727046. The cubic root of 1161520 is about 105.1176308303.

Subtracting from 1161520 its reverse (251611), we obtain a palindrome (909909).

It can be divided in two parts, 1161 and 520, that added together give a square (1681 = 41²).

The spelling of 1161520 in words is "one million, one hundred sixty-one thousand, five hundred twenty".