126139626 has 64 divisors (see below), whose sum is σ = 298425600. Its totient is φ = 39356928.

The previous prime is 126139621. The next prime is 126139631. The reversal of 126139626 is 626931621.

It is a happy number.

126139626 is a `hidden beast` number, since 1 + 26 + 1 + 3 + 9 + 626 = 666.

It is an interprime number because it is at equal distance from previous prime (126139621) and next prime (126139631).

It is a super-2 number, since 2×126139626² = 31822410494839752, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126139621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287115 + ... + 287553.

It is an arithmetic number, because the mean of its divisors is an integer number (4662900).

Almost surely, 2^126139626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126139626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149212800).

126139626 is an abundant number, since it is smaller than the sum of its proper divisors (172285974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126139626 is a wasteful number, since it uses less digits than its factorization.

126139626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 774 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 126139626 is about 11231.1898746304. The cubic root of 126139626 is about 501.5149068125.

The spelling of 126139626 in words is "one hundred twenty-six million, one hundred thirty-nine thousand, six hundred twenty-six".