12057217 has 4 divisors (see below), whose sum is σ = 12209920. Its totient is φ = 11904516.

The previous prime is 12057203. The next prime is 12057247. The reversal of 12057217 is 71275021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12057217 - 2¹⁹ = 11532929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12057191 and 12057200.

It is not an unprimeable number, because it can be changed into a prime (12057247) 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, 76233 + ... + 76390.

It is an arithmetic number, because the mean of its divisors is an integer number (3052480).

Almost surely, 2^12057217 is an apocalyptic number.

It is an amenable number.

12057217 is a deficient number, since it is larger than the sum of its proper divisors (152703).

12057217 is an equidigital number, since it uses as much as digits as its factorization.

12057217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152702.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 12057217 is about 3472.3503567469. The cubic root of 12057217 is about 229.3061445725.

The spelling of 12057217 in words is "twelve million, fifty-seven thousand, two hundred seventeen".