1881225 has 30 divisors (see below), whose sum is σ = 3488430. Its totient is φ = 1002240.

The previous prime is 1881223. The next prime is 1881241. The reversal of 1881225 is 5221881.

It can be written as a sum of positive squares in 3 ways, for example, as 9801 + 1871424 = 99^2 + 1368^2 .

It is not a de Polignac number, because 1881225 - 2¹ = 1881223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1881221) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1561 + ... + 2489.

It is an arithmetic number, because the mean of its divisors is an integer number (116281).

2^1881225 is an apocalyptic number.

1881225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1881225 is a deficient number, since it is larger than the sum of its proper divisors (1607205).

1881225 is an equidigital number, since it uses as much as digits as its factorization.

1881225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 937 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 1881225 is about 1371.5775588715. The cubic root of 1881225 is about 123.4469167094.

The spelling of 1881225 in words is "one million, eight hundred eighty-one thousand, two hundred twenty-five".