100126643 has 4 divisors (see below), whose sum is σ = 100200528. Its totient is φ = 100052760.

The previous prime is 100126639. The next prime is 100126667. The reversal of 100126643 is 346621001.

It is a happy number.

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 100126643 - 2² = 100126639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100126043) 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, 34871 + ... + 37632.

It is an arithmetic number, because the mean of its divisors is an integer number (25050132).

Almost surely, 2^100126643 is an apocalyptic number.

100126643 is a deficient number, since it is larger than the sum of its proper divisors (73885).

100126643 is an equidigital number, since it uses as much as digits as its factorization.

100126643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73884.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 100126643 is about 10006.3301464623. The cubic root of 100126643 is about 464.3547422822.

Adding to 100126643 its reverse (346621001), we get a palindrome (446747644).

The spelling of 100126643 in words is "one hundred million, one hundred twenty-six thousand, six hundred forty-three".