126174749 has 2 divisors, whose sum is σ = 126174750. Its totient is φ = 126174748.

The previous prime is 126174707. The next prime is 126174751. The reversal of 126174749 is 947471621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75864100 + 50310649 = 8710^2 + 7093^2 .

It is an emirp because it is prime and its reverse (947471621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126174749 is a prime.

Together with 126174751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126174049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63087374 + 63087375.

It is an arithmetic number, because the mean of its divisors is an integer number (63087375).

Almost surely, 2^126174749 is an apocalyptic number.

It is an amenable number.

126174749 is a deficient number, since it is larger than the sum of its proper divisors (1).

126174749 is an equidigital number, since it uses as much as digits as its factorization.

126174749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 126174749 is about 11232.7534024388. The cubic root of 126174749 is about 501.5614506676.

The spelling of 126174749 in words is "one hundred twenty-six million, one hundred seventy-four thousand, seven hundred forty-nine".