1881559 has 2 divisors, whose sum is σ = 1881560. Its totient is φ = 1881558.

The previous prime is 1881533. The next prime is 1881587. The reversal of 1881559 is 9551881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1881559 - 2⁷ = 1881431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1888559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940779 + 940780.

It is an arithmetic number, because the mean of its divisors is an integer number (940780).

2^1881559 is an apocalyptic number.

1881559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881559 is an equidigital number, since it uses as much as digits as its factorization.

1881559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 37.

The square root of 1881559 is about 1371.6993110737. The cubic root of 1881559 is about 123.4542220256.

The spelling of 1881559 in words is "one million, eight hundred eighty-one thousand, five hundred fifty-nine".