1156641 has 8 divisors (see below), whose sum is σ = 1592064. Its totient is φ = 746160.

The previous prime is 1156637. The next prime is 1156643. The reversal of 1156641 is 1466511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1156641 - 2² = 1156637 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1156643) 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, 6126 + ... + 6311.

It is an arithmetic number, because the mean of its divisors is an integer number (199008).

2^1156641 is an apocalyptic number.

It is an amenable number.

1156641 is a deficient number, since it is larger than the sum of its proper divisors (435423).

1156641 is a wasteful number, since it uses less digits than its factorization.

1156641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12471.

The product of its digits is 720, while the sum is 24.

The square root of 1156641 is about 1075.4724543195. The cubic root of 1156641 is about 104.9702409996.

The spelling of 1156641 in words is "one million, one hundred fifty-six thousand, six hundred forty-one".