13125646 has 4 divisors (see below), whose sum is σ = 19688472. Its totient is φ = 6562822.

The previous prime is 13125611. The next prime is 13125653. The reversal of 13125646 is 64652131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64652131 = 61 ⋅1059871.

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, 3281410 + ... + 3281413.

It is an arithmetic number, because the mean of its divisors is an integer number (4922118).

Almost surely, 2^13125646 is an apocalyptic number.

13125646 is a deficient number, since it is larger than the sum of its proper divisors (6562826).

13125646 is an equidigital number, since it uses as much as digits as its factorization.

13125646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6562825.

The product of its digits is 4320, while the sum is 28.

The square root of 13125646 is about 3622.9333419206. The cubic root of 13125646 is about 235.8885689591. Note that the first 3 decimals are identical.

Adding to 13125646 its reverse (64652131), we get a palindrome (77777777).

The spelling of 13125646 in words is "thirteen million, one hundred twenty-five thousand, six hundred forty-six".