121552042 has 4 divisors (see below), whose sum is σ = 182328066. Its totient is φ = 60776020.

The previous prime is 121552037. The next prime is 121552043. The reversal of 121552042 is 240255121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 111112681 + 10439361 = 10541^2 + 3231^2 .

It is not an unprimeable number, because it can be changed into a prime (121552043) by changing a digit.

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 as a sum of consecutive naturals, namely, 30388009 + ... + 30388012.

Almost surely, 2^121552042 is an apocalyptic number.

121552042 is a deficient number, since it is larger than the sum of its proper divisors (60776024).

121552042 is an equidigital number, since it uses as much as digits as its factorization.

121552042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60776023.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 121552042 is about 11025.0642628513. The cubic root of 121552042 is about 495.3597928359.

The spelling of 121552042 in words is "one hundred twenty-one million, five hundred fifty-two thousand, forty-two".