126573149 has 2 divisors, whose sum is σ = 126573150. Its totient is φ = 126573148.

The previous prime is 126573133. The next prime is 126573199. The reversal of 126573149 is 941375621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126405049 + 168100 = 11243^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 126573149 - 2⁴ = 126573133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126573199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63286574 + 63286575.

It is an arithmetic number, because the mean of its divisors is an integer number (63286575).

Almost surely, 2^126573149 is an apocalyptic number.

It is an amenable number.

126573149 is a deficient number, since it is larger than the sum of its proper divisors (1).

126573149 is an equidigital number, since it uses as much as digits as its factorization.

126573149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 126573149 is about 11250.4732789336. The cubic root of 126573149 is about 502.0887937301.

The spelling of 126573149 in words is "one hundred twenty-six million, five hundred seventy-three thousand, one hundred forty-nine".