1812789025 has 12 divisors (see below), whose sum is σ = 2248610544. Its totient is φ = 1449746000.

The previous prime is 1812789019. The next prime is 1812789037. The reversal of 1812789025 is 5209872181.

It is a happy number.

It is not a de Polignac number, because 1812789025 - 2⁹ = 1812788513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76890 + ... + 97660.

It is an arithmetic number, because the mean of its divisors is an integer number (187384212).

Almost surely, 2^1812789025 is an apocalyptic number.

It is an amenable number.

1812789025 is a deficient number, since it is larger than the sum of its proper divisors (435821519).

1812789025 is a wasteful number, since it uses less digits than its factorization.

1812789025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24272 (or 24267 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 1812789025 is about 42576.8602059851. The cubic root of 1812789025 is about 1219.3145448525.

The spelling of 1812789025 in words is "one billion, eight hundred twelve million, seven hundred eighty-nine thousand, twenty-five".