122645749 has 2 divisors, whose sum is σ = 122645750. Its totient is φ = 122645748.

The previous prime is 122645723. The next prime is 122645753. The reversal of 122645749 is 947546221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85655025 + 36990724 = 9255^2 + 6082^2 .

It is a cyclic number.

It is not a de Polignac number, because 122645749 - 2¹⁵ = 122612981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122645249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61322874 + 61322875.

It is an arithmetic number, because the mean of its divisors is an integer number (61322875).

Almost surely, 2^122645749 is an apocalyptic number.

It is an amenable number.

122645749 is a deficient number, since it is larger than the sum of its proper divisors (1).

122645749 is an equidigital number, since it uses as much as digits as its factorization.

122645749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 122645749 is about 11074.5541219500. The cubic root of 122645749 is about 496.8410831852.

The spelling of 122645749 in words is "one hundred twenty-two million, six hundred forty-five thousand, seven hundred forty-nine".