121505455 has 8 divisors (see below), whose sum is σ = 147169872. Its totient is φ = 96295488.

The previous prime is 121505453. The next prime is 121505471. The reversal of 121505455 is 554505121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121505455 - 2¹ = 121505453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121505453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113022 + ... + 114091.

It is an arithmetic number, because the mean of its divisors is an integer number (18396234).

Almost surely, 2^121505455 is an apocalyptic number.

121505455 is a deficient number, since it is larger than the sum of its proper divisors (25664417).

121505455 is a wasteful number, since it uses less digits than its factorization.

121505455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227225.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 121505455 is about 11022.9512835719. The cubic root of 121505455 is about 495.2964995744.

The spelling of 121505455 in words is "one hundred twenty-one million, five hundred five thousand, four hundred fifty-five".