12643496 has 8 divisors (see below), whose sum is σ = 23706570. Its totient is φ = 6321744.

The previous prime is 12643489. The next prime is 12643511. The reversal of 12643496 is 69434621.

It can be written as a sum of positive squares in only one way, i.e., 7214596 + 5428900 = 2686^2 + 2330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12643496² = 319715982204032, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790211 + ... + 790226.

Almost surely, 2^12643496 is an apocalyptic number.

It is an amenable number.

12643496 is a deficient number, since it is larger than the sum of its proper divisors (11063074).

12643496 is a wasteful number, since it uses less digits than its factorization.

12643496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580443 (or 1580439 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 12643496 is about 3555.7693963473. The cubic root of 12643496 is about 232.9641308596.

The spelling of 12643496 in words is "twelve million, six hundred forty-three thousand, four hundred ninety-six".