126991641 has 8 divisors (see below), whose sum is σ = 193511104. Its totient is φ = 72566640.

The previous prime is 126991621. The next prime is 126991661. The reversal of 126991641 is 146199621.

It is an interprime number because it is at equal distance from previous prime (126991621) and next prime (126991661).

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

It is not a de Polignac number, because 126991641 - 2¹¹ = 126989593 is a prime.

It is a super-2 number, since 2×126991641² = 32253753767745762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126991641.

It is not an unprimeable number, because it can be changed into a prime (126991621) 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, 3023590 + ... + 3023631.

It is an arithmetic number, because the mean of its divisors is an integer number (24188888).

Almost surely, 2^126991641 is an apocalyptic number.

It is an amenable number.

126991641 is a deficient number, since it is larger than the sum of its proper divisors (66519463).

126991641 is an equidigital number, since it uses as much as digits as its factorization.

126991641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047231.

The product of its digits is 23328, while the sum is 39.

The square root of 126991641 is about 11269.0567928288. The cubic root of 126991641 is about 502.6415412767.

The spelling of 126991641 in words is "one hundred twenty-six million, nine hundred ninety-one thousand, six hundred forty-one".