1831149 has 6 divisors (see below), whose sum is σ = 2645006. Its totient is φ = 1220760.

The previous prime is 1831133. The next prime is 1831153. The reversal of 1831149 is 9411381.

It can be written as a sum of positive squares in only one way, i.e., 1822500 + 8649 = 1350^2 + 93^2 .

It is not a de Polignac number, because 1831149 - 2⁴ = 1831133 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1831129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101722 + ... + 101739.

2^1831149 is an apocalyptic number.

It is an amenable number.

1831149 is a deficient number, since it is larger than the sum of its proper divisors (813857).

1831149 is a wasteful number, since it uses less digits than its factorization.

1831149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203467 (or 203464 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 1831149 is about 1353.1995418267. The cubic root of 1831149 is about 122.3417142075.

The spelling of 1831149 in words is "one million, eight hundred thirty-one thousand, one hundred forty-nine".