121186542 has 8 divisors (see below), whose sum is σ = 242373096. Its totient is φ = 40395512.

The previous prime is 121186519. The next prime is 121186561. The reversal of 121186542 is 245681121.

It is a sphenic number, since it is the product of 3 distinct primes.

121186542 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10098873 + ... + 10098884.

It is an arithmetic number, because the mean of its divisors is an integer number (30296637).

Almost surely, 2^121186542 is an apocalyptic number.

121186542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121186542 is a wasteful number, since it uses less digits than its factorization.

121186542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20197762.

The product of its digits is 3840, while the sum is 30.

The square root of 121186542 is about 11008.4759163110. The cubic root of 121186542 is about 494.8627882112.

The spelling of 121186542 in words is "one hundred twenty-one million, one hundred eighty-six thousand, five hundred forty-two".