122744287 has 2 divisors, whose sum is σ = 122744288. Its totient is φ = 122744286.

The previous prime is 122744257. The next prime is 122744339. The reversal of 122744287 is 782447221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122744287 is a prime.

It is a super-2 number, since 2×122744287² = 30132319982276738, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122744257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61372143 + 61372144.

It is an arithmetic number, because the mean of its divisors is an integer number (61372144).

Almost surely, 2^122744287 is an apocalyptic number.

122744287 is a deficient number, since it is larger than the sum of its proper divisors (1).

122744287 is an equidigital number, since it uses as much as digits as its factorization.

122744287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50176, while the sum is 37.

The square root of 122744287 is about 11079.0020759994. The cubic root of 122744287 is about 496.9741075567.

It can be divided in two parts, 12274 and 4287, that added together give a palindrome (16561).

The spelling of 122744287 in words is "one hundred twenty-two million, seven hundred forty-four thousand, two hundred eighty-seven".