1881129 has 8 divisors (see below), whose sum is σ = 2555712. Its totient is φ = 1230320.

The previous prime is 1881127. The next prime is 1881151. The reversal of 1881129 is 9211881.

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 1881129 - 2¹ = 1881127 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1881096 and 1881105.

It is not an unprimeable number, because it can be changed into a prime (1881127) 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, 5757 + ... + 6074.

It is an arithmetic number, because the mean of its divisors is an integer number (319464).

2^1881129 is an apocalyptic number.

It is an amenable number.

1881129 is a deficient number, since it is larger than the sum of its proper divisors (674583).

1881129 is a wasteful number, since it uses less digits than its factorization.

1881129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11887.

The product of its digits is 1152, while the sum is 30.

The square root of 1881129 is about 1371.5425622269. The cubic root of 1881129 is about 123.4448168178. Note that the first 3 decimals are identical.

The spelling of 1881129 in words is "one million, eight hundred eighty-one thousand, one hundred twenty-nine".