1214561399 has 2 divisors, whose sum is σ = 1214561400. Its totient is φ = 1214561398.

The previous prime is 1214561353. The next prime is 1214561407. The reversal of 1214561399 is 9931654121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1214561399 - 2²⁰ = 1213512823 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214561599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607280699 + 607280700.

It is an arithmetic number, because the mean of its divisors is an integer number (607280700).

Almost surely, 2^1214561399 is an apocalyptic number.

1214561399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214561399 is an equidigital number, since it uses as much as digits as its factorization.

1214561399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 1214561399 is about 34850.5580873535. The cubic root of 1214561399 is about 1066.9395761438.

The spelling of 1214561399 in words is "one billion, two hundred fourteen million, five hundred sixty-one thousand, three hundred ninety-nine".