121806534 has 16 divisors (see below), whose sum is σ = 245367360. Its totient is φ = 40309800.

The previous prime is 121806527. The next prime is 121806539. The reversal of 121806534 is 435608121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121806539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72192 + ... + 73859.

It is an arithmetic number, because the mean of its divisors is an integer number (15335460).

Almost surely, 2^121806534 is an apocalyptic number.

121806534 is an abundant number, since it is smaller than the sum of its proper divisors (123560826).

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

121806534 is a wasteful number, since it uses less digits than its factorization.

121806534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146195.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 121806534 is about 11036.5997481108. The cubic root of 121806534 is about 495.7052613946.

The spelling of 121806534 in words is "one hundred twenty-one million, eight hundred six thousand, five hundred thirty-four".