725281 has 8 divisors (see below), whose sum is σ = 753984. Its totient is φ = 697200.

The previous prime is 725273. The next prime is 725293. The reversal of 725281 is 182527.

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 725281 - 2³ = 725273 is a prime.

It is a super-2 number, since 2×725281² = 1052065057922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4260 + ... + 4426.

It is an arithmetic number, because the mean of its divisors is an integer number (94248).

2⁷²⁵²⁸¹ is an apocalyptic number.

It is an amenable number.

725281 is a deficient number, since it is larger than the sum of its proper divisors (28703).

725281 is a wasteful number, since it uses less digits than its factorization.

725281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its digits is 1120, while the sum is 25.

The square root of 725281 is about 851.6343111923. The cubic root of 725281 is about 89.8466937385.

The spelling of 725281 in words is "seven hundred twenty-five thousand, two hundred eighty-one".