121605042 has 32 divisors (see below), whose sum is σ = 262342080. Its totient is φ = 37356480.

The previous prime is 121605023. The next prime is 121605049. The reversal of 121605042 is 240506121.

It is not an unprimeable number, because it can be changed into a prime (121605049) 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 in 15 ways as a sum of consecutive naturals, for example, 84384 + ... + 85812.

It is an arithmetic number, because the mean of its divisors is an integer number (8198190).

Almost surely, 2^121605042 is an apocalyptic number.

121605042 is an abundant number, since it is smaller than the sum of its proper divisors (140737038).

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

121605042 is a wasteful number, since it uses less digits than its factorization.

121605042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 121605042 is about 11027.4676150057. The cubic root of 121605042 is about 495.4317791601.

The spelling of 121605042 in words is "one hundred twenty-one million, six hundred five thousand, forty-two".