122874781 has 2 divisors, whose sum is σ = 122874782. Its totient is φ = 122874780.

The previous prime is 122874761. The next prime is 122874863. The reversal of 122874781 is 187478221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77528025 + 45346756 = 8805^2 + 6734^2 .

It is a cyclic number.

It is not a de Polignac number, because 122874781 - 2¹¹ = 122872733 is a prime.

It is a super-2 number, since 2×122874781² = 30196423611595922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122874701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61437390 + 61437391.

It is an arithmetic number, because the mean of its divisors is an integer number (61437391).

Almost surely, 2^122874781 is an apocalyptic number.

It is an amenable number.

122874781 is a deficient number, since it is larger than the sum of its proper divisors (1).

122874781 is an equidigital number, since it uses as much as digits as its factorization.

122874781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50176, while the sum is 40.

The square root of 122874781 is about 11084.8897603900. The cubic root of 122874781 is about 497.1501623779.

The spelling of 122874781 in words is "one hundred twenty-two million, eight hundred seventy-four thousand, seven hundred eighty-one".