121837542 has 8 divisors (see below), whose sum is σ = 243675096. Its totient is φ = 40612512.

The previous prime is 121837493. The next prime is 121837543. The reversal of 121837542 is 245738121.

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

121837542 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121837543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10153123 + ... + 10153134.

It is an arithmetic number, because the mean of its divisors is an integer number (30459387).

Almost surely, 2^121837542 is an apocalyptic number.

121837542 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.

121837542 is a wasteful number, since it uses less digits than its factorization.

121837542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20306262.

The product of its digits is 13440, while the sum is 33.

The square root of 121837542 is about 11038.0044392091. The cubic root of 121837542 is about 495.7473213294.

The spelling of 121837542 in words is "one hundred twenty-one million, eight hundred thirty-seven thousand, five hundred forty-two".