1812061 has 2 divisors, whose sum is σ = 1812062. Its totient is φ = 1812060.

The previous prime is 1812059. The next prime is 1812073. The reversal of 1812061 is 1602181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1279161 + 532900 = 1131^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1812061 - 2¹ = 1812059 is a prime.

Together with 1812059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1812091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906030 + 906031.

It is an arithmetic number, because the mean of its divisors is an integer number (906031).

2^1812061 is an apocalyptic number.

It is an amenable number.

1812061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812061 is an equidigital number, since it uses as much as digits as its factorization.

1812061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1812061 is about 1346.1281514031. The cubic root of 1812061 is about 121.9151295421.

It can be divided in two parts, 18120 and 61, that added together give a palindrome (18181).

The spelling of 1812061 in words is "one million, eight hundred twelve thousand, sixty-one".