725851 has 8 divisors (see below), whose sum is σ = 838880. Its totient is φ = 615168.

The previous prime is 725827. The next prime is 725861. The reversal of 725851 is 158527.

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 725851 - 2⁷ = 725723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (725801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145 + ... + 1213.

It is an arithmetic number, because the mean of its divisors is an integer number (104860).

2⁷²⁵⁸⁵¹ is an apocalyptic number.

725851 is a deficient number, since it is larger than the sum of its proper divisors (113029).

725851 is a wasteful number, since it uses less digits than its factorization.

725851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173.

The product of its digits is 2800, while the sum is 28.

The square root of 725851 is about 851.9688961459. The cubic root of 725851 is about 89.8702244827.

The spelling of 725851 in words is "seven hundred twenty-five thousand, eight hundred fifty-one".