1209168541 has 6 divisors (see below), whose sum is σ = 1406583870. Its totient is φ = 1036430136.

The previous prime is 1209168539. The next prime is 1209168551. The reversal of 1209168541 is 1458619021.

It can be written as a sum of positive squares in only one way, i.e., 896762916 + 312405625 = 29946^2 + 17675^2 .

It is not a de Polignac number, because 1209168541 - 2¹ = 1209168539 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 1209168541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209168511) 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 5 ways as a sum of consecutive naturals, for example, 12338406 + ... + 12338503.

It is an arithmetic number, because the mean of its divisors is an integer number (234430645).

Almost surely, 2^1209168541 is an apocalyptic number.

It is an amenable number.

1209168541 is a deficient number, since it is larger than the sum of its proper divisors (197415329).

1209168541 is an equidigital number, since it uses as much as digits as its factorization.

1209168541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24676923 (or 24676916 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 1209168541 is about 34773.1008252068. The cubic root of 1209168541 is about 1065.3581024446.

The spelling of 1209168541 in words is "one billion, two hundred nine million, one hundred sixty-eight thousand, five hundred forty-one".