126442623 has 4 divisors (see below), whose sum is σ = 168590168. Its totient is φ = 84295080.

The previous prime is 126442609. The next prime is 126442627. The reversal of 126442623 is 326244621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 126442623 - 2⁶ = 126442559 is a prime.

It is a super-2 number, since 2×126442623² = 31975473822240258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126442627) 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, 21073768 + ... + 21073773.

It is an arithmetic number, because the mean of its divisors is an integer number (42147542).

Almost surely, 2^126442623 is an apocalyptic number.

126442623 is a deficient number, since it is larger than the sum of its proper divisors (42147545).

126442623 is an equidigital number, since it uses as much as digits as its factorization.

126442623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42147544.

The product of its digits is 13824, while the sum is 30.

The square root of 126442623 is about 11244.6708711282. The cubic root of 126442623 is about 501.9161447316.

The spelling of 126442623 in words is "one hundred twenty-six million, four hundred forty-two thousand, six hundred twenty-three".