121535755 has 8 divisors (see below), whose sum is σ = 159101424. Its totient is φ = 88389600.

The previous prime is 121535699. The next prime is 121535773. The reversal of 121535755 is 557535121.

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

It is not a de Polignac number, because 121535755 - 2¹¹ = 121533707 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 121535755.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1104816 + ... + 1104925.

It is an arithmetic number, because the mean of its divisors is an integer number (19887678).

Almost surely, 2^121535755 is an apocalyptic number.

121535755 is a deficient number, since it is larger than the sum of its proper divisors (37565669).

121535755 is a wasteful number, since it uses less digits than its factorization.

121535755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209757.

The product of its digits is 26250, while the sum is 34.

The square root of 121535755 is about 11024.3256029564. The cubic root of 121535755 is about 495.3376670995.

The spelling of 121535755 in words is "one hundred twenty-one million, five hundred thirty-five thousand, seven hundred fifty-five".