121772455 has 16 divisors (see below), whose sum is σ = 169357824. Its totient is φ = 82323360.

The previous prime is 121772423. The next prime is 121772473. The reversal of 121772455 is 554277121.

It is not a de Polignac number, because 121772455 - 2⁵ = 121772423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121772455.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22017 + ... + 26986.

It is an arithmetic number, because the mean of its divisors is an integer number (10584864).

Almost surely, 2^121772455 is an apocalyptic number.

121772455 is a deficient number, since it is larger than the sum of its proper divisors (47585369).

121772455 is an equidigital number, since it uses as much as digits as its factorization.

121772455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49086.

The product of its digits is 19600, while the sum is 34.

The square root of 121772455 is about 11035.0557316218. The cubic root of 121772455 is about 495.6590276535.

The spelling of 121772455 in words is "one hundred twenty-one million, seven hundred seventy-two thousand, four hundred fifty-five".