121455255 has 16 divisors (see below), whose sum is σ = 197230464. Its totient is φ = 63808800.

The previous prime is 121455251. The next prime is 121455287. The reversal of 121455255 is 552554121.

It is not a de Polignac number, because 121455255 - 2² = 121455251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121455251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59421 + ... + 61430.

It is an arithmetic number, because the mean of its divisors is an integer number (12326904).

Almost surely, 2^121455255 is an apocalyptic number.

121455255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121455255 is a deficient number, since it is larger than the sum of its proper divisors (75775209).

121455255 is a wasteful number, since it uses less digits than its factorization.

121455255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120926.

The product of its digits is 10000, while the sum is 30.

The square root of 121455255 is about 11020.6739812046. The cubic root of 121455255 is about 495.2282795666.

The spelling of 121455255 in words is "one hundred twenty-one million, four hundred fifty-five thousand, two hundred fifty-five".