1850561 has 2 divisors, whose sum is σ = 1850562. Its totient is φ = 1850560.

The previous prime is 1850521. The next prime is 1850573. The reversal of 1850561 is 1650581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 961 = 1360^2 + 31^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1850561 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1850561.

It is not a weakly prime, because it can be changed into another prime (1850521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925280 + 925281.

It is an arithmetic number, because the mean of its divisors is an integer number (925281).

2^1850561 is an apocalyptic number.

It is an amenable number.

1850561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850561 is an equidigital number, since it uses as much as digits as its factorization.

1850561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1850561 is about 1360.3532629431. The cubic root of 1850561 is about 122.7725100890.

The spelling of 1850561 in words is "one million, eight hundred fifty thousand, five hundred sixty-one".