1881349 has 2 divisors, whose sum is σ = 1881350. Its totient is φ = 1881348.

The previous prime is 1881343. The next prime is 1881389. The reversal of 1881349 is 9431881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1512900 + 368449 = 1230^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 1881349 - 2⁷ = 1881221 is a prime.

1881349 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1881343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940674 + 940675.

It is an arithmetic number, because the mean of its divisors is an integer number (940675).

2^1881349 is an apocalyptic number.

It is an amenable number.

1881349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881349 is an equidigital number, since it uses as much as digits as its factorization.

1881349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 1881349 is about 1371.6227615493. The cubic root of 1881349 is about 123.4496289636.

The spelling of 1881349 in words is "one million, eight hundred eighty-one thousand, three hundred forty-nine".