126123661 has 8 divisors (see below), whose sum is σ = 128482848. Its totient is φ = 123774000.

The previous prime is 126123659. The next prime is 126123677. The reversal of 126123661 is 166321621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126123661 - 2¹ = 126123659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126123611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27846 + ... + 32056.

It is an arithmetic number, because the mean of its divisors is an integer number (16060356).

Almost surely, 2^126123661 is an apocalyptic number.

It is an amenable number.

126123661 is a deficient number, since it is larger than the sum of its proper divisors (2359187).

126123661 is an equidigital number, since it uses as much as digits as its factorization.

126123661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763.

The product of its digits is 2592, while the sum is 28.

The square root of 126123661 is about 11230.4791082126. The cubic root of 126123661 is about 501.4937476586.

The spelling of 126123661 in words is "one hundred twenty-six million, one hundred twenty-three thousand, six hundred sixty-one".