811451401 has 4 divisors (see below), whose sum is σ = 811556100. Its totient is φ = 811346704.

The previous prime is 811451369. The next prime is 811451413. The reversal of 811451401 is 104154118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104154118 = 2 ⋅52077059.

It can be written as a sum of positive squares in 2 ways, for example, as 539168400 + 272283001 = 23220^2 + 16501^2 .

It is a cyclic number.

It is not a de Polignac number, because 811451401 - 2⁵ = 811451369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811451491) 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, 39706 + ... + 56563.

It is an arithmetic number, because the mean of its divisors is an integer number (202889025).

Almost surely, 2^811451401 is an apocalyptic number.

It is an amenable number.

811451401 is a deficient number, since it is larger than the sum of its proper divisors (104699).

811451401 is an equidigital number, since it uses as much as digits as its factorization.

811451401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104698.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 811451401 is about 28485.9860457735. The cubic root of 811451401 is about 932.7261899821.

The spelling of 811451401 in words is "eight hundred eleven million, four hundred fifty-one thousand, four hundred one".