12549646 has 4 divisors (see below), whose sum is σ = 18824472. Its totient is φ = 6274822.

The previous prime is 12549643. The next prime is 12549653. The reversal of 12549646 is 64694521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64694521 = 593 ⋅109097.

It is a super-2 number, since 2×12549646² = 314987229450632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12549643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3137410 + ... + 3137413.

It is an arithmetic number, because the mean of its divisors is an integer number (4706118).

Almost surely, 2^12549646 is an apocalyptic number.

12549646 is a deficient number, since it is larger than the sum of its proper divisors (6274826).

12549646 is an equidigital number, since it uses as much as digits as its factorization.

12549646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6274825.

The product of its digits is 51840, while the sum is 37.

The square root of 12549646 is about 3542.5479530982. The cubic root of 12549646 is about 232.3862842373.

The spelling of 12549646 in words is "twelve million, five hundred forty-nine thousand, six hundred forty-six".