1891149 has 8 divisors (see below), whose sum is σ = 2715552. Its totient is φ = 1163760.

The previous prime is 1891147. The next prime is 1891163. The reversal of 1891149 is 9411981.

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

It is not a de Polignac number, because 1891149 - 2¹ = 1891147 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1891147) 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 7 ways as a sum of consecutive naturals, for example, 24207 + ... + 24284.

It is an arithmetic number, because the mean of its divisors is an integer number (339444).

2^1891149 is an apocalyptic number.

It is an amenable number.

1891149 is a deficient number, since it is larger than the sum of its proper divisors (824403).

1891149 is a wasteful number, since it uses less digits than its factorization.

1891149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48507.

The product of its digits is 2592, while the sum is 33.

The square root of 1891149 is about 1375.1905322536. The cubic root of 1891149 is about 123.6636087167.

The spelling of 1891149 in words is "one million, eight hundred ninety-one thousand, one hundred forty-nine".