725602161 has 16 divisors (see below), whose sum is σ = 987977984. Its totient is φ = 473570064.

The previous prime is 725602139. The next prime is 725602187. The reversal of 725602161 is 161206527.

It is not a de Polignac number, because 725602161 - 2¹³ = 725593969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (725602861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21690 + ... + 43836.

It is an arithmetic number, because the mean of its divisors is an integer number (61748624).

Almost surely, 2^725602161 is an apocalyptic number.

It is an amenable number.

725602161 is a deficient number, since it is larger than the sum of its proper divisors (262375823).

725602161 is a wasteful number, since it uses less digits than its factorization.

725602161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22380.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 725602161 is about 26937.0035638710. The cubic root of 725602161 is about 898.5995342490.

Adding to 725602161 its reverse (161206527), we get a palindrome (886808688).

The spelling of 725602161 in words is "seven hundred twenty-five million, six hundred two thousand, one hundred sixty-one".