7126256731 has 4 divisors (see below), whose sum is σ = 7774098264. Its totient is φ = 6478415200.

The previous prime is 7126256729. The next prime is 7126256737. The reversal of 7126256731 is 1376526217.

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

It is a cyclic number.

It is not a de Polignac number, because 7126256731 - 2¹ = 7126256729 is a prime.

It is a super-2 number, since 2×7126256731² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7126256737) 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, 323920750 + ... + 323920771.

It is an arithmetic number, because the mean of its divisors is an integer number (1943524566).

Almost surely, 2^7126256731 is an apocalyptic number.

7126256731 is a deficient number, since it is larger than the sum of its proper divisors (647841533).

7126256731 is a wasteful number, since it uses less digits than its factorization.

7126256731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647841532.

The product of its digits is 105840, while the sum is 40.

The square root of 7126256731 is about 84417.1589844150. The cubic root of 7126256731 is about 1924.3636942078.

The spelling of 7126256731 in words is "seven billion, one hundred twenty-six million, two hundred fifty-six thousand, seven hundred thirty-one".