1801449 has 24 divisors (see below), whose sum is σ = 2850120. Its totient is φ = 1089792.

The previous prime is 1801433. The next prime is 1801453. The reversal of 1801449 is 9441081.

It can be written as a sum of positive squares in 4 ways, for example, as 129600 + 1671849 = 360^2 + 1293^2 .

It is not a de Polignac number, because 1801449 - 2⁴ = 1801433 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1801469) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10327 + ... + 10499.

It is an arithmetic number, because the mean of its divisors is an integer number (118755).

2^1801449 is an apocalyptic number.

It is an amenable number.

1801449 is a deficient number, since it is larger than the sum of its proper divisors (1048671).

1801449 is a wasteful number, since it uses less digits than its factorization.

1801449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1801449 is about 1342.1806882831. The cubic root of 1801449 is about 121.6766723074.

The spelling of 1801449 in words is "one million, eight hundred one thousand, four hundred forty-nine".