126391641 has 8 divisors (see below), whose sum is σ = 168641760. Its totient is φ = 84201312.

The previous prime is 126391637. The next prime is 126391649. The reversal of 126391641 is 146193621.

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

It is not a de Polignac number, because 126391641 - 2² = 126391637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126391649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9756 + ... + 18653.

It is an arithmetic number, because the mean of its divisors is an integer number (21080220).

Almost surely, 2^126391641 is an apocalyptic number.

It is an amenable number.

126391641 is a deficient number, since it is larger than the sum of its proper divisors (42250119).

126391641 is a wasteful number, since it uses less digits than its factorization.

126391641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29895.

The product of its digits is 7776, while the sum is 33.

The square root of 126391641 is about 11242.4037020559. The cubic root of 126391641 is about 501.8486776908.

The spelling of 126391641 in words is "one hundred twenty-six million, three hundred ninety-one thousand, six hundred forty-one".