726554 has 4 divisors (see below), whose sum is σ = 1089834. Its totient is φ = 363276.

The previous prime is 726533. The next prime is 726559. The reversal of 726554 is 455627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 528529 + 198025 = 727^2 + 445^2 .

It is not an unprimeable number, because it can be changed into a prime (726559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181637 + ... + 181640.

2⁷²⁶⁵⁵⁴ is an apocalyptic number.

726554 is a deficient number, since it is larger than the sum of its proper divisors (363280).

726554 is a wasteful number, since it uses less digits than its factorization.

726554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363279.

The product of its digits is 8400, while the sum is 29.

The square root of 726554 is about 852.3813700451. The cubic root of 726554 is about 89.8992287743.

It can be divided in two parts, 726 and 554, that multiplied together give a palindrome (402204).

The spelling of 726554 in words is "seven hundred twenty-six thousand, five hundred fifty-four".