126631645 has 8 divisors (see below), whose sum is σ = 173666304. Its totient is φ = 86833104.

The previous prime is 126631643. The next prime is 126631651. The reversal of 126631645 is 546136621.

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 126631645 - 2¹ = 126631643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126631645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126631643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1808989 + ... + 1809058.

It is an arithmetic number, because the mean of its divisors is an integer number (21708288).

Almost surely, 2^126631645 is an apocalyptic number.

It is an amenable number.

126631645 is a deficient number, since it is larger than the sum of its proper divisors (47034659).

126631645 is an equidigital number, since it uses as much as digits as its factorization.

126631645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3618059.

The product of its digits is 25920, while the sum is 34.

The square root of 126631645 is about 11253.0726914919. The cubic root of 126631645 is about 502.1661288863.

The spelling of 126631645 in words is "one hundred twenty-six million, six hundred thirty-one thousand, six hundred forty-five".