1801049 has 4 divisors (see below), whose sum is σ = 1849764. Its totient is φ = 1752336.

The previous prime is 1801039. The next prime is 1801073. The reversal of 1801049 is 9401081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9401081 = 47 ⋅200023.

It can be written as a sum of positive squares in 2 ways, for example, as 1338649 + 462400 = 1157^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801049 - 2¹² = 1796953 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1801039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24302 + ... + 24375.

It is an arithmetic number, because the mean of its divisors is an integer number (462441).

2^1801049 is an apocalyptic number.

It is an amenable number.

1801049 is a deficient number, since it is larger than the sum of its proper divisors (48715).

1801049 is an equidigital number, since it uses as much as digits as its factorization.

1801049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48714.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1801049 is about 1342.0316687769. The cubic root of 1801049 is about 121.6676658036.

The spelling of 1801049 in words is "one million, eight hundred one thousand, forty-nine".