121542355 has 16 divisors (see below), whose sum is σ = 161489664. Its totient is φ = 87072480.

The previous prime is 121542347. The next prime is 121542389. The reversal of 121542355 is 553245121.

It is not a de Polignac number, because 121542355 - 2³ = 121542347 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 12807 + ... + 20176.

It is an arithmetic number, because the mean of its divisors is an integer number (10093104).

Almost surely, 2^121542355 is an apocalyptic number.

121542355 is a deficient number, since it is larger than the sum of its proper divisors (39947309).

121542355 is a wasteful number, since it uses less digits than its factorization.

121542355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33066.

The product of its digits is 6000, while the sum is 28.

The square root of 121542355 is about 11024.6249369310. The cubic root of 121542355 is about 495.3466333757.

Adding to 121542355 its reverse (553245121), we get a palindrome (674787476).

The spelling of 121542355 in words is "one hundred twenty-one million, five hundred forty-two thousand, three hundred fifty-five".