121545342 has 48 divisors (see below), whose sum is σ = 282035520. Its totient is φ = 37694976.

The previous prime is 121545329. The next prime is 121545343. The reversal of 121545342 is 243545121.

121545342 is a `hidden beast` number, since 121 + 5 + 4 + 534 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121545343) 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 23 ways as a sum of consecutive naturals, for example, 25003 + ... + 29465.

It is an arithmetic number, because the mean of its divisors is an integer number (5875740).

Almost surely, 2^121545342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121545342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141017760).

121545342 is an abundant number, since it is smaller than the sum of its proper divisors (160490178).

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

121545342 is a wasteful number, since it uses less digits than its factorization.

121545342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577 (or 4574 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 121545342 is about 11024.7604055598. The cubic root of 121545342 is about 495.3506911882.

The spelling of 121545342 in words is "one hundred twenty-one million, five hundred forty-five thousand, three hundred forty-two".