1815061 has 2 divisors, whose sum is σ = 1815062. Its totient is φ = 1815060.

The previous prime is 1815053. The next prime is 1815083. The reversal of 1815061 is 1605181.

It is an a-pointer prime, because the next prime (1815083) can be obtained adding 1815061 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1674436 + 140625 = 1294^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1815061 - 2³ = 1815053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1815001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 907530 + 907531.

It is an arithmetic number, because the mean of its divisors is an integer number (907531).

2^1815061 is an apocalyptic number.

It is an amenable number.

1815061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1815061 is an equidigital number, since it uses as much as digits as its factorization.

1815061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1815061 is about 1347.2419975639. The cubic root of 1815061 is about 121.9823722627.

The spelling of 1815061 in words is "one million, eight hundred fifteen thousand, sixty-one".