801251405 has 6 divisors (see below), whose sum is σ = 961577646. Its totient is φ = 640950488.

The previous prime is 801251359. The next prime is 801251453. The reversal of 801251405 is 504152108.

It can be written as a sum of positive squares in only one way, i.e., 641001124 + 160250281 = 25318^2 + 12659^2 .

It is not a de Polignac number, because 801251405 - 2¹⁸ = 800989261 is a prime.

It is a Duffinian number.

It is a congruent 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, 56966 + ... + 69624.

It is an arithmetic number, because the mean of its divisors is an integer number (160262941).

Almost surely, 2^801251405 is an apocalyptic number.

It is an amenable number.

801251405 is a deficient number, since it is larger than the sum of its proper divisors (160326241).

801251405 is an frugal number, since it uses more digits than its factorization.

801251405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25323 (or 12664 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 801251405 is about 28306.3845271698. The cubic root of 801251405 is about 928.8015568425.

The spelling of 801251405 in words is "eight hundred one million, two hundred fifty-one thousand, four hundred five".