1156920 has 64 divisors (see below), whose sum is σ = 3594240. Its totient is φ = 297600.

The previous prime is 1156907. The next prime is 1156927. The reversal of 1156920 is 296511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3565 + ... + 3875.

It is an arithmetic number, because the mean of its divisors is an integer number (56160).

2^1156920 is an apocalyptic number.

1156920 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 1156920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1797120).

1156920 is an abundant number, since it is smaller than the sum of its proper divisors (2437320).

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

1156920 is a wasteful number, since it uses less digits than its factorization.

1156920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1156920 is about 1075.6021569335. The cubic root of 1156920 is about 104.9786804788.

1156920 divided by its sum of digits (24) gives a triangular number (48205 = T₃₁₀).

The spelling of 1156920 in words is "one million, one hundred fifty-six thousand, nine hundred twenty".