12900581 has 2 divisors, whose sum is σ = 12900582. Its totient is φ = 12900580.

The previous prime is 12900553. The next prime is 12900593. The reversal of 12900581 is 18500921.

It is a happy number.

12900581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 2076481 = 3290^2 + 1441^2 .

It is an emirp because it is prime and its reverse (18500921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12900581 - 2¹⁴ = 12884197 is a prime.

It is a super-2 number, since 2×12900581² = 332849980275122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12900581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12900521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6450290 + 6450291.

It is an arithmetic number, because the mean of its divisors is an integer number (6450291).

Almost surely, 2^12900581 is an apocalyptic number.

It is an amenable number.

12900581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12900581 is an equidigital number, since it uses as much as digits as its factorization.

12900581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 12900581 is about 3591.7378801911. The cubic root of 12900581 is about 234.5325308001.

The spelling of 12900581 in words is "twelve million, nine hundred thousand, five hundred eighty-one".