1800061 has 4 divisors (see below), whose sum is σ = 1816992. Its totient is φ = 1783132.

The previous prime is 1800047. The next prime is 1800067. The reversal of 1800061 is 1600081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1800061 - 2⁹ = 1799549 is a prime.

It is a Duffinian number.

1800061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800067) 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, 8305 + ... + 8518.

It is an arithmetic number, because the mean of its divisors is an integer number (454248).

2^1800061 is an apocalyptic number.

It is an amenable number.

1800061 is a deficient number, since it is larger than the sum of its proper divisors (16931).

1800061 is a wasteful number, since it uses less digits than its factorization.

1800061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16930.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1800061 is about 1341.6635196650. The cubic root of 1800061 is about 121.6454140231.

The spelling of 1800061 in words is "one million, eight hundred thousand, sixty-one".