725002161 has 32 divisors (see below), whose sum is σ = 1072256640. Its totient is φ = 432843264.

The previous prime is 725002151. The next prime is 725002163. The reversal of 725002161 is 161200527.

It is not a de Polignac number, because 725002161 - 2⁶ = 725002097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (725002163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 820626 + ... + 821508.

It is an arithmetic number, because the mean of its divisors is an integer number (33508020).

Almost surely, 2^725002161 is an apocalyptic number.

It is an amenable number.

725002161 is a deficient number, since it is larger than the sum of its proper divisors (347254479).

725002161 is a wasteful number, since it uses less digits than its factorization.

725002161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 725002161 is about 26925.8641644052. The cubic root of 725002161 is about 898.3517821390.

Adding to 725002161 its reverse (161200527), we get a palindrome (886202688).

The spelling of 725002161 in words is "seven hundred twenty-five million, two thousand, one hundred sixty-one".