725483521 has 4 divisors (see below), whose sum is σ = 829124032. Its totient is φ = 621843012.

The previous prime is 725483519. The next prime is 725483527. The reversal of 725483521 is 125384527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 725483521 - 2¹ = 725483519 is a prime.

It is a super-4 number, since 4×725483521⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725483527) 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, 51820245 + ... + 51820258.

It is an arithmetic number, because the mean of its divisors is an integer number (207281008).

It is a Proth number, since it is equal to 5535 ⋅ 2¹⁷ + 1 and 5535 < 2¹⁷.

Almost surely, 2^725483521 is an apocalyptic number.

It is an amenable number.

725483521 is a deficient number, since it is larger than the sum of its proper divisors (103640511).

725483521 is a wasteful number, since it uses less digits than its factorization.

725483521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103640510.

The product of its digits is 67200, while the sum is 37.

The square root of 725483521 is about 26934.8012986916. The cubic root of 725483521 is about 898.5505562344.

The spelling of 725483521 in words is "seven hundred twenty-five million, four hundred eighty-three thousand, five hundred twenty-one".