122427391 has 2 divisors, whose sum is σ = 122427392. Its totient is φ = 122427390.

The previous prime is 122427379. The next prime is 122427443. The reversal of 122427391 is 193724221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122427391 - 2¹⁷ = 122296319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122427691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61213695 + 61213696.

It is an arithmetic number, because the mean of its divisors is an integer number (61213696).

Almost surely, 2^122427391 is an apocalyptic number.

122427391 is a deficient number, since it is larger than the sum of its proper divisors (1).

122427391 is an equidigital number, since it uses as much as digits as its factorization.

122427391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 122427391 is about 11064.6911841226. The cubic root of 122427391 is about 496.5460500661.

The spelling of 122427391 in words is "one hundred twenty-two million, four hundred twenty-seven thousand, three hundred ninety-one".