126197947 has 4 divisors (see below), whose sum is σ = 127926760. Its totient is φ = 124469136.

The previous prime is 126197923. The next prime is 126197977. The reversal of 126197947 is 749791621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749791621 = 18059 ⋅41519.

It is a cyclic number.

It is not a de Polignac number, because 126197947 - 2¹¹ = 126195899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126197897 and 126197906.

It is not an unprimeable number, because it can be changed into a prime (126197977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864297 + ... + 864442.

It is an arithmetic number, because the mean of its divisors is an integer number (31981690).

Almost surely, 2^126197947 is an apocalyptic number.

126197947 is a deficient number, since it is larger than the sum of its proper divisors (1728813).

126197947 is an equidigital number, since it uses as much as digits as its factorization.

126197947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728812.

The product of its digits is 190512, while the sum is 46.

The square root of 126197947 is about 11233.7859602184. The cubic root of 126197947 is about 501.5921871650.

The spelling of 126197947 in words is "one hundred twenty-six million, one hundred ninety-seven thousand, nine hundred forty-seven".