243874542 has 16 divisors (see below), whose sum is σ = 492485760. Its totient is φ = 80502072.

The previous prime is 243874541. The next prime is 243874567. The reversal of 243874542 is 245478342.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 243874542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243874541) 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, 196692 + ... + 197927.

It is an arithmetic number, because the mean of its divisors is an integer number (30780360).

Almost surely, 2^243874542 is an apocalyptic number.

243874542 is an abundant number, since it is smaller than the sum of its proper divisors (248611218).

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

243874542 is a wasteful number, since it uses less digits than its factorization.

243874542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394727.

The product of its digits is 215040, while the sum is 39.

The square root of 243874542 is about 15616.4830227552. The cubic root of 243874542 is about 624.7728599685.

The spelling of 243874542 in words is "two hundred forty-three million, eight hundred seventy-four thousand, five hundred forty-two".