1156489 has 4 divisors (see below), whose sum is σ = 1158660. Its totient is φ = 1154320.

The previous prime is 1156483. The next prime is 1156501. The reversal of 1156489 is 9846511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 990025 + 166464 = 995^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156489 - 2⁵ = 1156457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156483) 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, 327 + ... + 1555.

It is an arithmetic number, because the mean of its divisors is an integer number (289665).

2^1156489 is an apocalyptic number.

It is an amenable number.

1156489 is a deficient number, since it is larger than the sum of its proper divisors (2171).

1156489 is an equidigital number, since it uses as much as digits as its factorization.

1156489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170.

The product of its digits is 8640, while the sum is 34.

The square root of 1156489 is about 1075.4017853807. The cubic root of 1156489 is about 104.9656425761.

The spelling of 1156489 in words is "one million, one hundred fifty-six thousand, four hundred eighty-nine".