1881572 has 48 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 710400.

The previous prime is 1881559. The next prime is 1881587. The reversal of 1881572 is 2751881.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12554 + ... + 12702.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2^1881572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1881572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2116800).

1881572 is an abundant number, since it is smaller than the sum of its proper divisors (2352028).

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

1881572 is a wasteful number, since it uses less digits than its factorization.

1881572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 210 counting only the distinct ones).

The product of its digits is 4480, while the sum is 32.

The square root of 1881572 is about 1371.7040497133. The cubic root of 1881572 is about 123.4545063467.

The spelling of 1881572 in words is "one million, eight hundred eighty-one thousand, five hundred seventy-two".