121306842 has 32 divisors (see below), whose sum is σ = 272361600. Its totient is φ = 40017024.

The previous prime is 121306819. The next prime is 121306847. The reversal of 121306842 is 248603121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121306847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6342 + ... + 16817.

It is an arithmetic number, because the mean of its divisors is an integer number (8511300).

Almost surely, 2^121306842 is an apocalyptic number.

121306842 is an abundant number, since it is smaller than the sum of its proper divisors (151054758).

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

121306842 is a wasteful number, since it uses less digits than its factorization.

121306842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23267 (or 23261 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 121306842 is about 11013.9385326049. The cubic root of 121306842 is about 495.0264815952.

Adding to 121306842 its reverse (248603121), we get a palindrome (369909963).

The spelling of 121306842 in words is "one hundred twenty-one million, three hundred six thousand, eight hundred forty-two".