12621487 has 2 divisors, whose sum is σ = 12621488. Its totient is φ = 12621486.

The previous prime is 12621451. The next prime is 12621493. The reversal of 12621487 is 78412621.

12621487 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12621487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12621787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310743 + 6310744.

It is an arithmetic number, because the mean of its divisors is an integer number (6310744).

Almost surely, 2^12621487 is an apocalyptic number.

12621487 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621487 is an equidigital number, since it uses as much as digits as its factorization.

12621487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 12621487 is about 3552.6732188593. The cubic root of 12621487 is about 232.8288759287.

The spelling of 12621487 in words is "twelve million, six hundred twenty-one thousand, four hundred eighty-seven".