1156823 has 2 divisors, whose sum is σ = 1156824. Its totient is φ = 1156822.

The previous prime is 1156819. The next prime is 1156847. The reversal of 1156823 is 3286511.

It is a weak prime.

It is an emirp because it is prime and its reverse (3286511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1156823 - 2² = 1156819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1156792 and 1156801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578411 + 578412.

It is an arithmetic number, because the mean of its divisors is an integer number (578412).

2^1156823 is an apocalyptic number.

1156823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156823 is an equidigital number, since it uses as much as digits as its factorization.

1156823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 1156823 is about 1075.5570649668. The cubic root of 1156823 is about 104.9757464768.

The spelling of 1156823 in words is "one million, one hundred fifty-six thousand, eight hundred twenty-three".