126216047 has 4 divisors (see below), whose sum is σ = 126877056. Its totient is φ = 125555040.

The previous prime is 126216037. The next prime is 126216049. The reversal of 126216047 is 740612621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740612621 = 7 ⋅105801803.

It is a cyclic number.

It is not a de Polignac number, because 126216047 - 2²⁴ = 109438831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126216049) 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, 330218 + ... + 330599.

It is an arithmetic number, because the mean of its divisors is an integer number (31719264).

Almost surely, 2^126216047 is an apocalyptic number.

126216047 is a deficient number, since it is larger than the sum of its proper divisors (661009).

126216047 is an equidigital number, since it uses as much as digits as its factorization.

126216047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661008.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 126216047 is about 11234.5915368562. The cubic root of 126216047 is about 501.6161663839.

Adding to 126216047 its reverse (740612621), we get a palindrome (866828668).

The spelling of 126216047 in words is "one hundred twenty-six million, two hundred sixteen thousand, forty-seven".