121255769 has 2 divisors, whose sum is σ = 121255770. Its totient is φ = 121255768.

The previous prime is 121255759. The next prime is 121255801. The reversal of 121255769 is 967552121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102010000 + 19245769 = 10100^2 + 4387^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121255769 is a prime.

It is a super-2 number, since 2×121255769² = 29405923031562722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121255759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60627884 + 60627885.

It is an arithmetic number, because the mean of its divisors is an integer number (60627885).

Almost surely, 2^121255769 is an apocalyptic number.

It is an amenable number.

121255769 is a deficient number, since it is larger than the sum of its proper divisors (1).

121255769 is an equidigital number, since it uses as much as digits as its factorization.

121255769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 38.

The square root of 121255769 is about 11011.6197264526. The cubic root of 121255769 is about 494.9569992915.

The spelling of 121255769 in words is "one hundred twenty-one million, two hundred fifty-five thousand, seven hundred sixty-nine".