1156120 has 32 divisors (see below), whose sum is σ = 2973600. Its totient is φ = 396288.

The previous prime is 1156109. The next prime is 1156121. The reversal of 1156120 is 216511.

1156120 = T₈₄ + T₈₅ + ... + T₁₉₅.

It is a happy number.

It is a super-2 number, since 2×1156120² = 2673226908800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1156094 and 1156103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1785 + ... + 2344.

It is an arithmetic number, because the mean of its divisors is an integer number (92925).

2^1156120 is an apocalyptic number.

1156120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156120 is an abundant number, since it is smaller than the sum of its proper divisors (1817480).

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

1156120 is a wasteful number, since it uses less digits than its factorization.

1156120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4147 (or 4143 counting only the distinct ones).

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

The square root of 1156120 is about 1075.2302079090. The cubic root of 1156120 is about 104.9544776213.

The spelling of 1156120 in words is "one million, one hundred fifty-six thousand, one hundred twenty".