1788225 has 24 divisors (see below), whose sum is σ = 2996832. Its totient is φ = 940800.

The previous prime is 1788221. The next prime is 1788229. The reversal of 1788225 is 5228871.

It is an interprime number because it is at equal distance from previous prime (1788221) and next prime (1788229).

It is not a de Polignac number, because 1788225 - 2² = 1788221 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1788221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8370 + ... + 8580.

It is an arithmetic number, because the mean of its divisors is an integer number (124868).

2^1788225 is an apocalyptic number.

1788225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1788225 is a deficient number, since it is larger than the sum of its proper divisors (1208607).

1788225 is a wasteful number, since it uses less digits than its factorization.

1788225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 332 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 1788225 is about 1337.2453028521. The cubic root of 1788225 is about 121.3782078174.

The spelling of 1788225 in words is "one million, seven hundred eighty-eight thousand, two hundred twenty-five".