243122126 has 16 divisors (see below), whose sum is σ = 399394800. Its totient is φ = 110307648.

The previous prime is 243122123. The next prime is 243122141. The reversal of 243122126 is 621221342.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243122123) 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, 77711 + ... + 80778.

It is an arithmetic number, because the mean of its divisors is an integer number (24962175).

Almost surely, 2^243122126 is an apocalyptic number.

243122126 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

243122126 is a deficient number, since it is larger than the sum of its proper divisors (156272674).

243122126 is a wasteful number, since it uses less digits than its factorization.

243122126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158563.

The product of its digits is 1152, while the sum is 23.

The square root of 243122126 is about 15592.3739693480. The cubic root of 243122126 is about 624.1296694555.

Adding to 243122126 its reverse (621221342), we get a palindrome (864343468).

The spelling of 243122126 in words is "two hundred forty-three million, one hundred twenty-two thousand, one hundred twenty-six".