725411721 has 8 divisors (see below), whose sum is σ = 972126144. Its totient is φ = 481152560.

The previous prime is 725411719. The next prime is 725411723. The reversal of 725411721 is 127114527.

It is an interprime number because it is at equal distance from previous prime (725411719) and next prime (725411723).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 725411721 - 2¹ = 725411719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (725411723) 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 7 ways as a sum of consecutive naturals, for example, 613125 + ... + 614306.

It is an arithmetic number, because the mean of its divisors is an integer number (121515768).

Almost surely, 2^725411721 is an apocalyptic number.

It is an amenable number.

725411721 is a deficient number, since it is larger than the sum of its proper divisors (246714423).

725411721 is a wasteful number, since it uses less digits than its factorization.

725411721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227631.

The product of its digits is 3920, while the sum is 30.

The square root of 725411721 is about 26933.4684175655. The cubic root of 725411721 is about 898.5209125294.

The spelling of 725411721 in words is "seven hundred twenty-five million, four hundred eleven thousand, seven hundred twenty-one".