726451 has 4 divisors (see below), whose sum is σ = 792504. Its totient is φ = 660400.

The previous prime is 726431. The next prime is 726457. The reversal of 726451 is 154627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154627 = 11 ⋅14057.

It is a cyclic number.

It is not a de Polignac number, because 726451 - 2⁵ = 726419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726457) 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 3 ways as a sum of consecutive naturals, for example, 33010 + ... + 33031.

It is an arithmetic number, because the mean of its divisors is an integer number (198126).

2⁷²⁶⁴⁵¹ is an apocalyptic number.

726451 is a deficient number, since it is larger than the sum of its proper divisors (66053).

726451 is a wasteful number, since it uses less digits than its factorization.

726451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66052.

The product of its digits is 1680, while the sum is 25.

The square root of 726451 is about 852.3209489388. The cubic root of 726451 is about 89.8949803825.

The spelling of 726451 in words is "seven hundred twenty-six thousand, four hundred fifty-one".