126888643 has 4 divisors (see below), whose sum is σ = 145015600. Its totient is φ = 108761688.

The previous prime is 126888637. The next prime is 126888653. The reversal of 126888643 is 346888621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346888621 = 17 ⋅20405213.

It is a de Polignac number, because none of the positive numbers 2^k-126888643 is a prime.

It is a super-2 number, since 2×126888643² = 32201455444762898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126888593 and 126888602.

It is not an unprimeable number, because it can be changed into a prime (126888613) 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, 9063468 + ... + 9063481.

It is an arithmetic number, because the mean of its divisors is an integer number (36253900).

Almost surely, 2^126888643 is an apocalyptic number.

126888643 is a deficient number, since it is larger than the sum of its proper divisors (18126957).

126888643 is an equidigital number, since it uses as much as digits as its factorization.

126888643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18126956.

The product of its digits is 442368, while the sum is 46.

The square root of 126888643 is about 11264.4859181411. The cubic root of 126888643 is about 502.5056134947.

The spelling of 126888643 in words is "one hundred twenty-six million, eight hundred eighty-eight thousand, six hundred forty-three".