126399547 has 2 divisors, whose sum is σ = 126399548. Its totient is φ = 126399546.

The previous prime is 126399529. The next prime is 126399551. The reversal of 126399547 is 745993621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126399547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126399497 and 126399506.

It is not a weakly prime, because it can be changed into another prime (126399517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63199773 + 63199774.

It is an arithmetic number, because the mean of its divisors is an integer number (63199774).

Almost surely, 2^126399547 is an apocalyptic number.

126399547 is a deficient number, since it is larger than the sum of its proper divisors (1).

126399547 is an equidigital number, since it uses as much as digits as its factorization.

126399547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 126399547 is about 11242.7553117552. The cubic root of 126399547 is about 501.8591412861.

The spelling of 126399547 in words is "one hundred twenty-six million, three hundred ninety-nine thousand, five hundred forty-seven".