1156780 has 12 divisors (see below), whose sum is σ = 2429280. Its totient is φ = 462704.

The previous prime is 1156769. The next prime is 1156783. The reversal of 1156780 is 876511.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1156783) 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, 28900 + ... + 28939.

It is an arithmetic number, because the mean of its divisors is an integer number (202440).

2^1156780 is an apocalyptic number.

1156780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156780 is an abundant number, since it is smaller than the sum of its proper divisors (1272500).

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

1156780 is a wasteful number, since it uses less digits than its factorization.

1156780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57848 (or 57846 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1156780 is about 1075.5370751397. The cubic root of 1156780 is about 104.9744457843.

It can be divided in two parts, 1156 and 780, that added together give a square (1936 = 44²).

The spelling of 1156780 in words is "one million, one hundred fifty-six thousand, seven hundred eighty".