1885561 has 2 divisors, whose sum is σ = 1885562. Its totient is φ = 1885560.

The previous prime is 1885553. The next prime is 1885567. The reversal of 1885561 is 1655881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1577536 + 308025 = 1256^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1885561 - 2³ = 1885553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1885567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 942780 + 942781.

It is an arithmetic number, because the mean of its divisors is an integer number (942781).

2^1885561 is an apocalyptic number.

It is an amenable number.

1885561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1885561 is an equidigital number, since it uses as much as digits as its factorization.

1885561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 34.

The square root of 1885561 is about 1373.1573107259. The cubic root of 1885561 is about 123.5416874244.

The spelling of 1885561 in words is "one million, eight hundred eighty-five thousand, five hundred sixty-one".