287521325 has 48 divisors (see below), whose sum is σ = 448304640. Its totient is φ = 178053120.

The previous prime is 287521309. The next prime is 287521327. The reversal of 287521325 is 523125782.

It is not a de Polignac number, because 287521325 - 2⁴ = 287521309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287521327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105581 + ... + 108269.

It is an arithmetic number, because the mean of its divisors is an integer number (9339680).

Almost surely, 2^287521325 is an apocalyptic number.

287521325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

287521325 is a deficient number, since it is larger than the sum of its proper divisors (160783315).

287521325 is a wasteful number, since it uses less digits than its factorization.

287521325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766 (or 2761 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 287521325 is about 16956.4537860957. The cubic root of 287521325 is about 660.0193788311.

The spelling of 287521325 in words is "two hundred eighty-seven million, five hundred twenty-one thousand, three hundred twenty-five".