814021825 has 6 divisors (see below), whose sum is σ = 1009387094. Its totient is φ = 651217440.

The previous prime is 814021801. The next prime is 814021847. The reversal of 814021825 is 528120418.

It can be written as a sum of positive squares in 3 ways, for example, as 187470864 + 626550961 = 13692^2 + 25031^2 .

It is not a de Polignac number, because 814021825 - 2¹⁹ = 813497537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16280412 + ... + 16280461.

Almost surely, 2^814021825 is an apocalyptic number.

It is an amenable number.

814021825 is a deficient number, since it is larger than the sum of its proper divisors (195365269).

814021825 is a wasteful number, since it uses less digits than its factorization.

814021825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32560883 (or 32560878 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 814021825 is about 28531.0677157375. The cubic root of 814021825 is about 933.7100134188.

The spelling of 814021825 in words is "eight hundred fourteen million, twenty-one thousand, eight hundred twenty-five".