1209558141 has 12 divisors (see below), whose sum is σ = 1905970560. Its totient is φ = 733065480.

The previous prime is 1209558073. The next prime is 1209558151. The reversal of 1209558141 is 1418559021.

It is not a de Polignac number, because 1209558141 - 2¹⁷ = 1209427069 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1209558096 and 1209558105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209558151) 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 11 ways as a sum of consecutive naturals, for example, 6108781 + ... + 6108978.

It is an arithmetic number, because the mean of its divisors is an integer number (158830880).

Almost surely, 2^1209558141 is an apocalyptic number.

1209558141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1209558141 is a deficient number, since it is larger than the sum of its proper divisors (696412419).

1209558141 is a wasteful number, since it uses less digits than its factorization.

1209558141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12217776 (or 12217773 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 1209558141 is about 34778.7024053515. The cubic root of 1209558141 is about 1065.4725113496.

The spelling of 1209558141 in words is "one billion, two hundred nine million, five hundred fifty-eight thousand, one hundred forty-one".