126243737 has 2 divisors, whose sum is σ = 126243738. Its totient is φ = 126243736.

The previous prime is 126243697. The next prime is 126243769. The reversal of 126243737 is 737342621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105349696 + 20894041 = 10264^2 + 4571^2 .

It is a cyclic number.

It is not a de Polignac number, because 126243737 - 2⁶ = 126243673 is a prime.

It is a super-2 number, since 2×126243737² = 31874962263450338, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 126243697 and 126243706.

It is not a weakly prime, because it can be changed into another prime (126243787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63121868 + 63121869.

It is an arithmetic number, because the mean of its divisors is an integer number (63121869).

Almost surely, 2^126243737 is an apocalyptic number.

It is an amenable number.

126243737 is a deficient number, since it is larger than the sum of its proper divisors (1).

126243737 is an equidigital number, since it uses as much as digits as its factorization.

126243737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 35.

The square root of 126243737 is about 11235.8238238235. The cubic root of 126243737 is about 501.6528461785.

It can be divided in two parts, 12624 and 3737, that added together give a palindrome (16361).

The spelling of 126243737 in words is "one hundred twenty-six million, two hundred forty-three thousand, seven hundred thirty-seven".