121456369 has 2 divisors, whose sum is σ = 121456370. Its totient is φ = 121456368.

The previous prime is 121456351. The next prime is 121456403. The reversal of 121456369 is 963654121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109998144 + 11458225 = 10488^2 + 3385^2 .

It is an emirp because it is prime and its reverse (963654121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121456369 is a prime.

It is a super-2 number, since 2×121456369² = 29503299141328322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (121456469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60728184 + 60728185.

It is an arithmetic number, because the mean of its divisors is an integer number (60728185).

Almost surely, 2^121456369 is an apocalyptic number.

It is an amenable number.

121456369 is a deficient number, since it is larger than the sum of its proper divisors (1).

121456369 is an equidigital number, since it uses as much as digits as its factorization.

121456369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 121456369 is about 11020.7245224622. The cubic root of 121456369 is about 495.2297936568.

It can be divided in two parts, 121 and 456369, that added together give a triangular number (456490 = T₉₅₅).

The spelling of 121456369 in words is "one hundred twenty-one million, four hundred fifty-six thousand, three hundred sixty-nine".