121868562 has 16 divisors (see below), whose sum is σ = 244534752. Its totient is φ = 40489920.

The previous prime is 121868561. The next prime is 121868623. The reversal of 121868562 is 265868121.

It is a self number, because there is not a number n which added to its sum of digits gives 121868562.

It is not an unprimeable number, because it can be changed into a prime (121868561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31239 + ... + 34922.

It is an arithmetic number, because the mean of its divisors is an integer number (15283422).

Almost surely, 2^121868562 is an apocalyptic number.

121868562 is an abundant number, since it is smaller than the sum of its proper divisors (122666190).

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

121868562 is a wasteful number, since it uses less digits than its factorization.

121868562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66473.

The product of its digits is 46080, while the sum is 39.

The square root of 121868562 is about 11039.4094950772. The cubic root of 121868562 is about 495.7893904015.

The spelling of 121868562 in words is "one hundred twenty-one million, eight hundred sixty-eight thousand, five hundred sixty-two".