126745817 has 4 divisors (see below), whose sum is σ = 138268176. Its totient is φ = 115223460.

The previous prime is 126745799. The next prime is 126745837. The reversal of 126745817 is 718547621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 718547621 = 11 ⋅65322511.

It is not a de Polignac number, because 126745817 - 2⁶ = 126745753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126745837) 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, 5761163 + ... + 5761184.

It is an arithmetic number, because the mean of its divisors is an integer number (34567044).

Almost surely, 2^126745817 is an apocalyptic number.

It is an amenable number.

126745817 is a deficient number, since it is larger than the sum of its proper divisors (11522359).

126745817 is a wasteful number, since it uses less digits than its factorization.

126745817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11522358.

The product of its digits is 94080, while the sum is 41.

The square root of 126745817 is about 11258.1444741130. The cubic root of 126745817 is about 502.3170024145.

The spelling of 126745817 in words is "one hundred twenty-six million, seven hundred forty-five thousand, eight hundred seventeen".