126257849 has 2 divisors, whose sum is σ = 126257850. Its totient is φ = 126257848.

The previous prime is 126257783. The next prime is 126257893. The reversal of 126257849 is 948752621.

It is a happy number.

It is an a-pointer prime, because the next prime (126257893) can be obtained adding 126257849 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121000000 + 5257849 = 11000^2 + 2293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126257849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126257899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63128924 + 63128925.

It is an arithmetic number, because the mean of its divisors is an integer number (63128925).

Almost surely, 2^126257849 is an apocalyptic number.

It is an amenable number.

126257849 is a deficient number, since it is larger than the sum of its proper divisors (1).

126257849 is an equidigital number, since it uses as much as digits as its factorization.

126257849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 126257849 is about 11236.4517976094. The cubic root of 126257849 is about 501.6715376963.

The spelling of 126257849 in words is "one hundred twenty-six million, two hundred fifty-seven thousand, eight hundred forty-nine".