243041405 has 16 divisors (see below), whose sum is σ = 295907904. Its totient is φ = 191614080.

The previous prime is 243041387. The next prime is 243041441. The reversal of 243041405 is 504140342.

It is not a de Polignac number, because 243041405 - 2²² = 238847101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111809 + ... + 113961.

It is an arithmetic number, because the mean of its divisors is an integer number (18494244).

Almost surely, 2^243041405 is an apocalyptic number.

It is an amenable number.

243041405 is a deficient number, since it is larger than the sum of its proper divisors (52866499).

243041405 is a wasteful number, since it uses less digits than its factorization.

243041405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 243041405 is about 15589.7852775463. The cubic root of 243041405 is about 624.0605876479.

Adding to 243041405 its reverse (504140342), we get a palindrome (747181747).

The spelling of 243041405 in words is "two hundred forty-three million, forty-one thousand, four hundred five".