126291713 has 4 divisors (see below), whose sum is σ = 127542228. Its totient is φ = 125041200.

The previous prime is 126291709. The next prime is 126291749. The reversal of 126291713 is 317192621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119071744 + 7219969 = 10912^2 + 2687^2 .

It is a cyclic number.

It is not a de Polignac number, because 126291713 - 2² = 126291709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 126291713.

It is not an unprimeable number, because it can be changed into a prime (126297713) 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, 625106 + ... + 625307.

It is an arithmetic number, because the mean of its divisors is an integer number (31885557).

Almost surely, 2^126291713 is an apocalyptic number.

It is an amenable number.

126291713 is a deficient number, since it is larger than the sum of its proper divisors (1250515).

126291713 is a wasteful number, since it uses less digits than its factorization.

126291713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250514.

The product of its digits is 4536, while the sum is 32.

The square root of 126291713 is about 11237.9585779625. The cubic root of 126291713 is about 501.7163853011.

The spelling of 126291713 in words is "one hundred twenty-six million, two hundred ninety-one thousand, seven hundred thirteen".