814645261 has 4 divisors (see below), whose sum is σ = 815742432. Its totient is φ = 813548092.

The previous prime is 814645207. The next prime is 814645297. The reversal of 814645261 is 162546418.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 814645261 - 2¹⁵ = 814612493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 814645261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814645201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547471 + ... + 548956.

It is an arithmetic number, because the mean of its divisors is an integer number (203935608).

Almost surely, 2^814645261 is an apocalyptic number.

It is an amenable number.

814645261 is a deficient number, since it is larger than the sum of its proper divisors (1097171).

814645261 is a wasteful number, since it uses less digits than its factorization.

814645261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097170.

The product of its digits is 46080, while the sum is 37.

The square root of 814645261 is about 28541.9911884227. The cubic root of 814645261 is about 933.9483198436.

The spelling of 814645261 in words is "eight hundred fourteen million, six hundred forty-five thousand, two hundred sixty-one".