1881534 has 8 divisors (see below), whose sum is σ = 3763080. Its totient is φ = 627176.

The previous prime is 1881533. The next prime is 1881559. The reversal of 1881534 is 4351881.

It is a sphenic number, since it is the product of 3 distinct primes.

1881534 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156789 + ... + 156800.

It is an arithmetic number, because the mean of its divisors is an integer number (470385).

2^1881534 is an apocalyptic number.

1881534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1881534 is a wasteful number, since it uses less digits than its factorization.

1881534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313594.

The product of its digits is 3840, while the sum is 30.

The square root of 1881534 is about 1371.6901982591. The cubic root of 1881534 is about 123.4536752504.

It can be divided in two parts, 1881 and 534, that added together give a triangular number (2415 = T₆₉).

The spelling of 1881534 in words is "one million, eight hundred eighty-one thousand, five hundred thirty-four".