725344601 has 4 divisors (see below), whose sum is σ = 725426100. Its totient is φ = 725263104.

The previous prime is 725344573. The next prime is 725344619. The reversal of 725344601 is 106443527.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 106443527 = 1249 ⋅85223.

It can be written as a sum of positive squares in 2 ways, for example, as 313254601 + 412090000 = 17699^2 + 20300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725344601 is a prime.

It is a super-2 number, since 2×725344601² = 1052249580399698402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725344001) 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 3 ways as a sum of consecutive naturals, for example, 25496 + ... + 45833.

It is an arithmetic number, because the mean of its divisors is an integer number (181356525).

Almost surely, 2^725344601 is an apocalyptic number.

It is an amenable number.

725344601 is a deficient number, since it is larger than the sum of its proper divisors (81499).

725344601 is a wasteful number, since it uses less digits than its factorization.

725344601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81498.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 725344601 is about 26932.2223553869. Note that the first 3 decimals coincide. The cubic root of 725344601 is about 898.4931992635.

The spelling of 725344601 in words is "seven hundred twenty-five million, three hundred forty-four thousand, six hundred one".