12157223 has 8 divisors (see below), whose sum is σ = 13120800. Its totient is φ = 11197728.

The previous prime is 12157219. The next prime is 12157237. The reversal of 12157223 is 32275121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12157223 - 2² = 12157219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8558 + ... + 9876.

It is an arithmetic number, because the mean of its divisors is an integer number (1640100).

Almost surely, 2^12157223 is an apocalyptic number.

12157223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12157223 is a deficient number, since it is larger than the sum of its proper divisors (963577).

12157223 is a wasteful number, since it uses less digits than its factorization.

12157223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041.

The product of its digits is 840, while the sum is 23.

The square root of 12157223 is about 3486.7209524136. The cubic root of 12157223 is about 229.9383766856.

The spelling of 12157223 in words is "twelve million, one hundred fifty-seven thousand, two hundred twenty-three".