726040251 has 12 divisors (see below), whose sum is σ = 1073114328. Its totient is φ = 472770144.

The previous prime is 726040223. The next prime is 726040297. The reversal of 726040251 is 152040627.

726040251 is a `hidden beast` number, since 7 + 2 + 604 + 0 + 2 + 51 = 666.

It is not a de Polignac number, because 726040251 - 2⁵ = 726040219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (726048251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 937650 + ... + 938423.

It is an arithmetic number, because the mean of its divisors is an integer number (89426194).

Almost surely, 2^726040251 is an apocalyptic number.

726040251 is a deficient number, since it is larger than the sum of its proper divisors (347074077).

726040251 is a wasteful number, since it uses less digits than its factorization.

726040251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876122 (or 1876119 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 726040251 is about 26945.1340876233. The cubic root of 726040251 is about 898.7803441982.

Adding to 726040251 its reverse (152040627), we get a palindrome (878080878).

The spelling of 726040251 in words is "seven hundred twenty-six million, forty thousand, two hundred fifty-one".