726421265 has 8 divisors (see below), whose sum is σ = 878069160. Its totient is φ = 576894592.

The previous prime is 726421253. The next prime is 726421273. The reversal of 726421265 is 562124627.

It can be written as a sum of positive squares in 4 ways, for example, as 77598481 + 648822784 = 8809^2 + 25472^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 726421265 - 2⁸ = 726421009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529550 + ... + 530919.

It is an arithmetic number, because the mean of its divisors is an integer number (109758645).

Almost surely, 2^726421265 is an apocalyptic number.

It is an amenable number.

726421265 is a deficient number, since it is larger than the sum of its proper divisors (151647895).

726421265 is a wasteful number, since it uses less digits than its factorization.

726421265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060611.

The product of its digits is 40320, while the sum is 35.

The square root of 726421265 is about 26952.2033422130. The cubic root of 726421265 is about 898.9375384251.

The spelling of 726421265 in words is "seven hundred twenty-six million, four hundred twenty-one thousand, two hundred sixty-five".