805213025 has 12 divisors (see below), whose sum is σ = 1003697664. Its totient is φ = 640794000.

The previous prime is 805213021. The next prime is 805213037. The reversal of 805213025 is 520312508.

It is not a de Polignac number, because 805213025 - 2² = 805213021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 805212985 and 805213003.

It is not an unprimeable number, because it can be changed into a prime (805213021) 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, 79541 + ... + 89090.

It is an arithmetic number, because the mean of its divisors is an integer number (83641472).

Almost surely, 2^805213025 is an apocalyptic number.

It is an amenable number.

805213025 is a deficient number, since it is larger than the sum of its proper divisors (198484639).

805213025 is a wasteful number, since it uses less digits than its factorization.

805213025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168832 (or 168827 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 805213025 is about 28376.2757422464. The cubic root of 805213025 is about 930.3297959335.

The spelling of 805213025 in words is "eight hundred five million, two hundred thirteen thousand, twenty-five".