126503947 has 2 divisors, whose sum is σ = 126503948. Its totient is φ = 126503946.

The previous prime is 126503941. The next prime is 126504011. The reversal of 126503947 is 749305621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126503947 - 2¹¹ = 126501899 is a prime.

It is equal to p_7190875 and since 126503947 and 7190875 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (126503941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63251973 + 63251974.

It is an arithmetic number, because the mean of its divisors is an integer number (63251974).

Almost surely, 2^126503947 is an apocalyptic number.

126503947 is a deficient number, since it is larger than the sum of its proper divisors (1).

126503947 is an equidigital number, since it uses as much as digits as its factorization.

126503947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 126503947 is about 11247.3973433857. The cubic root of 126503947 is about 501.9972738380.

The spelling of 126503947 in words is "one hundred twenty-six million, five hundred three thousand, nine hundred forty-seven".