126512243 has 16 divisors (see below), whose sum is σ = 149306976. Its totient is φ = 105680640.

The previous prime is 126512237. The next prime is 126512251. The reversal of 126512243 is 342215621.

It is a happy number.

It is not a de Polignac number, because 126512243 - 2¹⁰ = 126511219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126512233) 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, 31421 + ... + 35217.

It is an arithmetic number, because the mean of its divisors is an integer number (9331686).

Almost surely, 2^126512243 is an apocalyptic number.

126512243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

126512243 is a deficient number, since it is larger than the sum of its proper divisors (22794733).

126512243 is a wasteful number, since it uses less digits than its factorization.

126512243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054.

The product of its digits is 2880, while the sum is 26.

The square root of 126512243 is about 11247.7661337707. The cubic root of 126512243 is about 502.0082470881.

Adding to 126512243 its reverse (342215621), we get a palindrome (468727864).

It can be divided in two parts, 1265 and 12243, that multiplied together give a triangular number (15487395 = T₅₅₆₅).

The spelling of 126512243 in words is "one hundred twenty-six million, five hundred twelve thousand, two hundred forty-three".