726561451 has 16 divisors (see below), whose sum is σ = 927940608. Its totient is φ = 552340800.

The previous prime is 726561403. The next prime is 726561461. The reversal of 726561451 is 154165627.

It is a happy number.

It is not a de Polignac number, because 726561451 - 2⁷ = 726561323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 726561451.

It is not an unprimeable number, because it can be changed into a prime (726561461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111915 + ... + 118228.

It is an arithmetic number, because the mean of its divisors is an integer number (57996288).

Almost surely, 2^726561451 is an apocalyptic number.

726561451 is a deficient number, since it is larger than the sum of its proper divisors (201379157).

726561451 is a wasteful number, since it uses less digits than its factorization.

726561451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230202.

The product of its digits is 50400, while the sum is 37.

The square root of 726561451 is about 26954.8038575687. The cubic root of 726561451 is about 898.9953608661.

The spelling of 726561451 in words is "seven hundred twenty-six million, five hundred sixty-one thousand, four hundred fifty-one".