725821002 has 48 divisors (see below), whose sum is σ = 1591050240. Its totient is φ = 239119776.

The previous prime is 725820947. The next prime is 725821003. The reversal of 725821002 is 200128527.

725821002 is a `hidden beast` number, since 72 + 582 + 10 + 0 + 2 = 666.

It is a super-2 number, since 2×725821002² = 1053632253888568008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (725821003) 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 23 ways as a sum of consecutive naturals, for example, 875124 + ... + 875952.

It is an arithmetic number, because the mean of its divisors is an integer number (33146880).

Almost surely, 2^725821002 is an apocalyptic number.

725821002 is an abundant number, since it is smaller than the sum of its proper divisors (865229238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725821002 is a wasteful number, since it uses less digits than its factorization.

725821002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 725821002 is about 26941.0653464187. The cubic root of 725821002 is about 898.6898641224.

Adding to 725821002 its reverse (200128527), we get a palindrome (925949529).

The spelling of 725821002 in words is "seven hundred twenty-five million, eight hundred twenty-one thousand, two".