243420541 has 16 divisors (see below), whose sum is σ = 300006784. Its totient is φ = 192331584.

The previous prime is 243420511. The next prime is 243420547. The reversal of 243420541 is 145024342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243420541 - 2¹³ = 243412349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243420547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89386 + ... + 92068.

It is an arithmetic number, because the mean of its divisors is an integer number (18750424).

Almost surely, 2^243420541 is an apocalyptic number.

It is an amenable number.

243420541 is a deficient number, since it is larger than the sum of its proper divisors (56586243).

243420541 is a wasteful number, since it uses less digits than its factorization.

243420541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 243420541 is about 15601.9402960016. The cubic root of 243420541 is about 624.3849232074.

Adding to 243420541 its reverse (145024342), we get a palindrome (388444883).

The spelling of 243420541 in words is "two hundred forty-three million, four hundred twenty thousand, five hundred forty-one".