1214639 has 2 divisors, whose sum is σ = 1214640. Its totient is φ = 1214638.

The previous prime is 1214623. The next prime is 1214641. The reversal of 1214639 is 9364121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1214639 - 2⁴ = 1214623 is a prime.

It is a Sophie Germain prime.

Together with 1214641, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607319 + 607320.

It is an arithmetic number, because the mean of its divisors is an integer number (607320).

2^1214639 is an apocalyptic number.

1214639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214639 is an equidigital number, since it uses as much as digits as its factorization.

1214639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 1214639 is about 1102.1066191617. The cubic root of 1214639 is about 106.6962298699.

The spelling of 1214639 in words is "one million, two hundred fourteen thousand, six hundred thirty-nine".