12861493 has 2 divisors, whose sum is σ = 12861494. Its totient is φ = 12861492.

The previous prime is 12861481. The next prime is 12861517. The reversal of 12861493 is 39416821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12794929 + 66564 = 3577^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 12861493 - 2¹³ = 12853301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12861403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6430746 + 6430747.

It is an arithmetic number, because the mean of its divisors is an integer number (6430747).

Almost surely, 2^12861493 is an apocalyptic number.

It is an amenable number.

12861493 is a deficient number, since it is larger than the sum of its proper divisors (1).

12861493 is an equidigital number, since it uses as much as digits as its factorization.

12861493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 12861493 is about 3586.2923751418. The cubic root of 12861493 is about 234.2954179113.

The spelling of 12861493 in words is "twelve million, eight hundred sixty-one thousand, four hundred ninety-three".