1825281 has 16 divisors (see below), whose sum is σ = 2747200. Its totient is φ = 1197504.

The previous prime is 1825277. The next prime is 1825297.

1825281 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1825281 - 2² = 1825277 is a prime.

It is a super-2 number, since 2×1825281² = 6663301457922, which contains 22 as substring.

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

It is a Duffinian number.

1825281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1825261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1305 + ... + 2313.

It is an arithmetic number, because the mean of its divisors is an integer number (171700).

2^1825281 is an apocalyptic number.

It is an amenable number.

1825281 is a deficient number, since it is larger than the sum of its proper divisors (921919).

1825281 is a wasteful number, since it uses less digits than its factorization.

1825281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1079 counting only the distinct ones).

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

The square root of 1825281 is about 1351.0296073736. The cubic root of 1825281 is about 122.2108911748.

The spelling of 1825281 in words is "one million, eight hundred twenty-five thousand, two hundred eighty-one".