12157646 has 4 divisors (see below), whose sum is σ = 18236472. Its totient is φ = 6078822.

The previous prime is 12157637. The next prime is 12157657. The reversal of 12157646 is 64675121.

12157646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64675121 = 7 ⋅9239303.

It is a super-2 number, since 2×12157646² = 295616712522632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3039410 + ... + 3039413.

It is an arithmetic number, because the mean of its divisors is an integer number (4559118).

Almost surely, 2^12157646 is an apocalyptic number.

12157646 is a deficient number, since it is larger than the sum of its proper divisors (6078826).

12157646 is an equidigital number, since it uses as much as digits as its factorization.

12157646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078825.

The product of its digits is 10080, while the sum is 32.

The square root of 12157646 is about 3486.7816105974. The cubic root of 12157646 is about 229.9410434899.

The spelling of 12157646 in words is "twelve million, one hundred fifty-seven thousand, six hundred forty-six".