725074121 has 4 divisors (see below), whose sum is σ = 736960644. Its totient is φ = 713187600.

The previous prime is 725074061. The next prime is 725074151. The reversal of 725074121 is 121470527.

725074121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 261145600 + 463928521 = 16160^2 + 21539^2 .

It is not a de Polignac number, because 725074121 - 2¹⁴ = 725057737 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (725074151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5943170 + ... + 5943291.

It is an arithmetic number, because the mean of its divisors is an integer number (184240161).

Almost surely, 2^725074121 is an apocalyptic number.

It is an amenable number.

725074121 is a deficient number, since it is larger than the sum of its proper divisors (11886523).

725074121 is a wasteful number, since it uses less digits than its factorization.

725074121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11886522.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 725074121 is about 26927.2003929113. The cubic root of 725074121 is about 898.3815030875.

The spelling of 725074121 in words is "seven hundred twenty-five million, seventy-four thousand, one hundred twenty-one".