1157223 has 4 divisors (see below), whose sum is σ = 1542968. Its totient is φ = 771480.

The previous prime is 1157213. The next prime is 1157227. The reversal of 1157223 is 3227511.

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

It is not a de Polignac number, because 1157223 - 2⁶ = 1157159 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1157223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157227) 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, 192868 + ... + 192873.

It is an arithmetic number, because the mean of its divisors is an integer number (385742).

2^1157223 is an apocalyptic number.

1157223 is a deficient number, since it is larger than the sum of its proper divisors (385745).

1157223 is an equidigital number, since it uses as much as digits as its factorization.

1157223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385744.

The product of its digits is 420, while the sum is 21.

The square root of 1157223 is about 1075.7429990476. The cubic root of 1157223 is about 104.9878443978.

The spelling of 1157223 in words is "one million, one hundred fifty-seven thousand, two hundred twenty-three".