1209861141 has 8 divisors (see below), whose sum is σ = 1622473440. Its totient is φ = 801911472.

The previous prime is 1209861071. The next prime is 1209861173. The reversal of 1209861141 is 1411689021.

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

It is not a de Polignac number, because 1209861141 - 2⁷ = 1209861013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209861241) 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, 1165051 + ... + 1166088.

It is an arithmetic number, because the mean of its divisors is an integer number (202809180).

Almost surely, 2^1209861141 is an apocalyptic number.

It is an amenable number.

1209861141 is a deficient number, since it is larger than the sum of its proper divisors (412612299).

1209861141 is a wasteful number, since it uses less digits than its factorization.

1209861141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331315.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 1209861141 is about 34783.0582467960. The cubic root of 1209861141 is about 1065.5614725458.

The spelling of 1209861141 in words is "one billion, two hundred nine million, eight hundred sixty-one thousand, one hundred forty-one".