1881925 has 6 divisors (see below), whose sum is σ = 2333618. Its totient is φ = 1505520.

The previous prime is 1881907. The next prime is 1881937. The reversal of 1881925 is 5291881.

It can be written as a sum of positive squares in 3 ways, for example, as 349281 + 1532644 = 591^2 + 1238^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1881925 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37614 + ... + 37663.

2^1881925 is an apocalyptic number.

It is an amenable number.

1881925 is a deficient number, since it is larger than the sum of its proper divisors (451693).

1881925 is an equidigital number, since it uses as much as digits as its factorization.

1881925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75287 (or 75282 counting only the distinct ones).

The product of its digits is 5760, while the sum is 34.

The square root of 1881925 is about 1371.8327157493. The cubic root of 1881925 is about 123.4622262596.

The spelling of 1881925 in words is "one million, eight hundred eighty-one thousand, nine hundred twenty-five".