1881556 has 6 divisors (see below), whose sum is σ = 3292730. Its totient is φ = 940776.

The previous prime is 1881533. The next prime is 1881559. The reversal of 1881556 is 6551881.

It can be written as a sum of positive squares in only one way, i.e., 1368900 + 512656 = 1170^2 + 716^2 .

It is a super-2 number, since 2×1881556² = 7080505962272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235191 + ... + 235198.

2^1881556 is an apocalyptic number.

It is an amenable number.

1881556 is a deficient number, since it is larger than the sum of its proper divisors (1411174).

1881556 is a wasteful number, since it uses less digits than its factorization.

1881556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470393 (or 470391 counting only the distinct ones).

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

The square root of 1881556 is about 1371.6982175391. The cubic root of 1881556 is about 123.4541564128.

The spelling of 1881556 in words is "one million, eight hundred eighty-one thousand, five hundred fifty-six".