12649045 has 4 divisors (see below), whose sum is σ = 15178860. Its totient is φ = 10119232.

The previous prime is 12649031. The next prime is 12649051. The reversal of 12649045 is 54094621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1633284 + 11015761 = 1278^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 12649045 - 2⁷ = 12648917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12648998 and 12649016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264900 + ... + 1264909.

It is an arithmetic number, because the mean of its divisors is an integer number (3794715).

Almost surely, 2^12649045 is an apocalyptic number.

It is an amenable number.

12649045 is a deficient number, since it is larger than the sum of its proper divisors (2529815).

12649045 is an equidigital number, since it uses as much as digits as its factorization.

12649045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529814.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 12649045 is about 3556.5495919500. The cubic root of 12649045 is about 232.9982071123.

The spelling of 12649045 in words is "twelve million, six hundred forty-nine thousand, forty-five".