281250125 has 32 divisors (see below), whose sum is σ = 400274784. Its totient is φ = 195456000.

The previous prime is 281250097. The next prime is 281250127. The reversal of 281250125 is 521052182.

It can be written as a sum of positive squares in 16 ways, for example, as 198330889 + 82919236 = 14083^2 + 9106^2 .

It is not a de Polignac number, because 281250125 - 2⁸ = 281249869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281250094 and 281250103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281250127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22535 + ... + 32715.

It is an arithmetic number, because the mean of its divisors is an integer number (12508587).

Almost surely, 2^281250125 is an apocalyptic number.

281250125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

281250125 is a deficient number, since it is larger than the sum of its proper divisors (119024659).

281250125 is a wasteful number, since it uses less digits than its factorization.

281250125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226 (or 10216 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 281250125 is about 16770.5135580280. The cubic root of 281250125 is about 655.1854456167.

The spelling of 281250125 in words is "two hundred eighty-one million, two hundred fifty thousand, one hundred twenty-five".