126138641 has 8 divisors (see below), whose sum is σ = 127617984. Its totient is φ = 124664400.

The previous prime is 126138631. The next prime is 126138643. The reversal of 126138641 is 146831621.

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 126138641 - 2⁶ = 126138577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 126138598 and 126138607.

It is not an unprimeable number, because it can be changed into a prime (126138643) 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, 71330 + ... + 73076.

It is an arithmetic number, because the mean of its divisors is an integer number (15952248).

Almost surely, 2^126138641 is an apocalyptic number.

It is an amenable number.

126138641 is a deficient number, since it is larger than the sum of its proper divisors (1479343).

126138641 is a wasteful number, since it uses less digits than its factorization.

126138641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551.

The product of its digits is 6912, while the sum is 32.

The square root of 126138641 is about 11231.1460234475. The cubic root of 126138641 is about 501.5136013981.

The spelling of 126138641 in words is "one hundred twenty-six million, one hundred thirty-eight thousand, six hundred forty-one".