814221425 has 6 divisors (see below), whose sum is σ = 1009634598. Its totient is φ = 651377120.

The previous prime is 814221403. The next prime is 814221439. The reversal of 814221425 is 524122418.

It can be written as a sum of positive squares in 3 ways, for example, as 1515361 + 812706064 = 1231^2 + 28508^2 .

It is a de Polignac number, because none of the positive numbers 2^k-814221425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16284404 + ... + 16284453.

It is an arithmetic number, because the mean of its divisors is an integer number (168272433).

Almost surely, 2^814221425 is an apocalyptic number.

It is an amenable number.

814221425 is a deficient number, since it is larger than the sum of its proper divisors (195413173).

814221425 is a wasteful number, since it uses less digits than its factorization.

814221425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32568867 (or 32568862 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 814221425 is about 28534.5654426347. The cubic root of 814221425 is about 933.7863231206.

The spelling of 814221425 in words is "eight hundred fourteen million, two hundred twenty-one thousand, four hundred twenty-five".