126409523 has 2 divisors, whose sum is σ = 126409524. Its totient is φ = 126409522.

The previous prime is 126409513. The next prime is 126409553. The reversal of 126409523 is 325904621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126409523 - 2¹⁴ = 126393139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126409523.

It is not a weakly prime, because it can be changed into another prime (126409513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63204761 + 63204762.

It is an arithmetic number, because the mean of its divisors is an integer number (63204762).

Almost surely, 2^126409523 is an apocalyptic number.

126409523 is a deficient number, since it is larger than the sum of its proper divisors (1).

126409523 is an equidigital number, since it uses as much as digits as its factorization.

126409523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 126409523 is about 11243.1989664864. The cubic root of 126409523 is about 501.8723439048.

The spelling of 126409523 in words is "one hundred twenty-six million, four hundred nine thousand, five hundred twenty-three".