121563755 has 8 divisors (see below), whose sum is σ = 146094192. Its totient is φ = 97105888.

The previous prime is 121563749. The next prime is 121563769. The reversal of 121563755 is 557365121.

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 121563755 - 2²² = 117369451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14384 + ... + 21213.

It is an arithmetic number, because the mean of its divisors is an integer number (18261774).

Almost surely, 2^121563755 is an apocalyptic number.

121563755 is a deficient number, since it is larger than the sum of its proper divisors (24530437).

121563755 is an equidigital number, since it uses as much as digits as its factorization.

121563755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36285.

The product of its digits is 31500, while the sum is 35.

The square root of 121563755 is about 11025.5954487728. The cubic root of 121563755 is about 495.3757036145.

The spelling of 121563755 in words is "one hundred twenty-one million, five hundred sixty-three thousand, seven hundred fifty-five".