121455287 has 2 divisors, whose sum is σ = 121455288. Its totient is φ = 121455286.

The previous prime is 121455251. The next prime is 121455289. The reversal of 121455287 is 782554121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121455287 - 2⁶ = 121455223 is a prime.

Together with 121455289, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121455289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60727643 + 60727644.

It is an arithmetic number, because the mean of its divisors is an integer number (60727644).

Almost surely, 2^121455287 is an apocalyptic number.

121455287 is a deficient number, since it is larger than the sum of its proper divisors (1).

121455287 is an equidigital number, since it uses as much as digits as its factorization.

121455287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 35.

The square root of 121455287 is about 11020.6754330213. The cubic root of 121455287 is about 495.2283230595.

The spelling of 121455287 in words is "one hundred twenty-one million, four hundred fifty-five thousand, two hundred eighty-seven".