121542042 has 16 divisors (see below), whose sum is σ = 243784800. Its totient is φ = 40397232.

The previous prime is 121542023. The next prime is 121542059. The reversal of 121542042 is 240245121.

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, 26928 + ... + 31115.

It is an arithmetic number, because the mean of its divisors is an integer number (15236550).

Almost surely, 2^121542042 is an apocalyptic number.

121542042 is an abundant number, since it is smaller than the sum of its proper divisors (122242758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121542042 is a wasteful number, since it uses less digits than its factorization.

121542042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58397.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 121542042 is about 11024.6107414276. The cubic root of 121542042 is about 495.3462081642.

Adding to 121542042 its reverse (240245121), we get a palindrome (361787163).

It can be divided in two parts, 12154 and 2042, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 121542042 in words is "one hundred twenty-one million, five hundred forty-two thousand, forty-two".