1801045 has 8 divisors (see below), whose sum is σ = 2235960. Its totient is φ = 1391040.

The previous prime is 1801039. The next prime is 1801073. The reversal of 1801045 is 5401081.

It can be written as a sum of positive squares in 4 ways, for example, as 636804 + 1164241 = 798^2 + 1079^2 .

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

It is not a de Polignac number, because 1801045 - 2⁵ = 1801013 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6066 + ... + 6355.

It is an arithmetic number, because the mean of its divisors is an integer number (279495).

2^1801045 is an apocalyptic number.

It is an amenable number.

1801045 is a deficient number, since it is larger than the sum of its proper divisors (434915).

1801045 is a wasteful number, since it uses less digits than its factorization.

1801045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12455.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1801045 is about 1342.0301784982. The cubic root of 1801045 is about 121.6675757318.

It can be divided in two parts, 180 and 1045, that added together give a triangular number (1225 = T₄₉).

The spelling of 1801045 in words is "one million, eight hundred one thousand, forty-five".