1171520 has 56 divisors (see below), whose sum is σ = 3194304. Its totient is φ = 400896.

The previous prime is 1171517. The next prime is 1171523. The reversal of 1171520 is 251711.

It is an interprime number because it is at equal distance from previous prime (1171517) and next prime (1171523).

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×1171520² = 2744918220800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1171523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1979 + ... + 2501.

2^1171520 is an apocalyptic number.

1171520 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 1171520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1597152).

1171520 is an abundant number, since it is smaller than the sum of its proper divisors (2022784).

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

1171520 is an equidigital number, since it uses as much as digits as its factorization.

1171520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1171520 is about 1082.3677748344. The cubic root of 1171520 is about 105.4184360930.

The spelling of 1171520 in words is "one million, one hundred seventy-one thousand, five hundred twenty".