126344639 has 4 divisors (see below), whose sum is σ = 126632880. Its totient is φ = 126056400.

The previous prime is 126344627. The next prime is 126344689. The reversal of 126344639 is 936443621.

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 126344639 - 2¹⁶ = 126279103 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 (126344609) 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, 143462 + ... + 144339.

It is an arithmetic number, because the mean of its divisors is an integer number (31658220).

Almost surely, 2^126344639 is an apocalyptic number.

126344639 is a deficient number, since it is larger than the sum of its proper divisors (288241).

126344639 is an equidigital number, since it uses as much as digits as its factorization.

126344639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288240.

The product of its digits is 93312, while the sum is 38.

The square root of 126344639 is about 11240.3131184145. The cubic root of 126344639 is about 501.7864615087.

The spelling of 126344639 in words is "one hundred twenty-six million, three hundred forty-four thousand, six hundred thirty-nine".