126875731 has 4 divisors (see below), whose sum is σ = 127381464. Its totient is φ = 126370000.

The previous prime is 126875699. The next prime is 126875741. The reversal of 126875731 is 137578621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137578621 = 563 ⋅244367.

It is a cyclic number.

It is not a de Polignac number, because 126875731 - 2⁵ = 126875699 is a prime.

It is a super-2 number, since 2×126875731² = 32194902233568722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126875741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252490 + ... + 252991.

It is an arithmetic number, because the mean of its divisors is an integer number (31845366).

Almost surely, 2^126875731 is an apocalyptic number.

126875731 is a deficient number, since it is larger than the sum of its proper divisors (505733).

126875731 is an equidigital number, since it uses as much as digits as its factorization.

126875731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505732.

The product of its digits is 70560, while the sum is 40.

The square root of 126875731 is about 11263.9127748753. The cubic root of 126875731 is about 502.4885681747.

The spelling of 126875731 in words is "one hundred twenty-six million, eight hundred seventy-five thousand, seven hundred thirty-one".