126256769 has 8 divisors (see below), whose sum is σ = 130882560. Its totient is φ = 121665600.

The previous prime is 126256751. The next prime is 126256813. The reversal of 126256769 is 967652621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126256769 is a prime.

It is a super-2 number, since 2×126256769² = 31881543436638722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126226769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112 + ... + 15929.

It is an arithmetic number, because the mean of its divisors is an integer number (16360320).

Almost surely, 2^126256769 is an apocalyptic number.

It is an amenable number.

126256769 is a deficient number, since it is larger than the sum of its proper divisors (4625791).

126256769 is a wasteful number, since it uses less digits than its factorization.

126256769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17311.

The product of its digits is 272160, while the sum is 44.

The square root of 126256769 is about 11236.4037396313. The cubic root of 126256769 is about 501.6701072723.

The spelling of 126256769 in words is "one hundred twenty-six million, two hundred fifty-six thousand, seven hundred sixty-nine".