1285001825 has 24 divisors (see below), whose sum is σ = 1688046720. Its totient is φ = 967636800.

The previous prime is 1285001821. The next prime is 1285001849. The reversal of 1285001825 is 5281005821.

It is a happy number.

It is not a de Polignac number, because 1285001825 - 2² = 1285001821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285001791 and 1285001800.

It is not an unprimeable number, because it can be changed into a prime (1285001821) 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, 65960 + ... + 83190.

It is an arithmetic number, because the mean of its divisors is an integer number (70335280).

Almost surely, 2^1285001825 is an apocalyptic number.

It is an amenable number.

1285001825 is a deficient number, since it is larger than the sum of its proper divisors (403044895).

1285001825 is a wasteful number, since it uses less digits than its factorization.

1285001825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17417 (or 17412 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 1285001825 is about 35846.9221133419. The cubic root of 1285001825 is about 1087.1794836479.

The spelling of 1285001825 in words is "one billion, two hundred eighty-five million, one thousand, eight hundred twenty-five".