126798643 has 4 divisors (see below), whose sum is σ = 131171040. Its totient is φ = 122426248.

The previous prime is 126798641. The next prime is 126798653. The reversal of 126798643 is 346897621.

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 126798643 - 2¹ = 126798641 is a prime.

It is a super-4 number, since 4×126798643⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126798593 and 126798602.

It is not an unprimeable number, because it can be changed into a prime (126798641) 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, 2186155 + ... + 2186212.

It is an arithmetic number, because the mean of its divisors is an integer number (32792760).

Almost surely, 2^126798643 is an apocalyptic number.

126798643 is a deficient number, since it is larger than the sum of its proper divisors (4372397).

126798643 is an equidigital number, since it uses as much as digits as its factorization.

126798643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4372396.

The product of its digits is 435456, while the sum is 46.

The square root of 126798643 is about 11260.4903534438. The cubic root of 126798643 is about 502.3867791086.

The spelling of 126798643 in words is "one hundred twenty-six million, seven hundred ninety-eight thousand, six hundred forty-three".