1241812172609 has 16 divisors (see below), whose sum is σ = 1254619756800. Its totient is φ = 1229075213184.

The previous prime is 1241812172563. The next prime is 1241812172621. The reversal of 1241812172609 is 9062712181421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1241812172609 - 2¹⁶ = 1241812107073 is a prime.

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 1241812172609.

It is not an unprimeable number, because it can be changed into a prime (1241812172309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98261639 + ... + 98274275.

It is an arithmetic number, because the mean of its divisors is an integer number (78413734800).

Almost surely, 2^{1241812172609} is an apocalyptic number.

It is an amenable number.

1241812172609 is a deficient number, since it is larger than the sum of its proper divisors (12807584191).

1241812172609 is a wasteful number, since it uses less digits than its factorization.

1241812172609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15352.

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 1241812172609 in words is "one trillion, two hundred forty-one billion, eight hundred twelve million, one hundred seventy-two thousand, six hundred nine".