725426 has 8 divisors (see below), whose sum is σ = 1171884. Its totient is φ = 334800.

The previous prime is 725423. The next prime is 725437. The reversal of 725426 is 624527.

It can be written as a sum of positive squares in 2 ways, for example, as 724201 + 1225 = 851^2 + 35^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 27901 = 725426 / (7 + 2 + 5 + 4 + 2 + 6).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 725395 and 725404.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725426.

It is not an unprimeable number, because it can be changed into a prime (725423) 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, 13925 + ... + 13976.

2⁷²⁵⁴²⁶ is an apocalyptic number.

725426 is a deficient number, since it is larger than the sum of its proper divisors (446458).

725426 is a wasteful number, since it uses less digits than its factorization.

725426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27916.

The product of its digits is 3360, while the sum is 26.

The square root of 725426 is about 851.7194373736. The cubic root of 725426 is about 89.8526807984.

The spelling of 725426 in words is "seven hundred twenty-five thousand, four hundred twenty-six".