801021401 has 2 divisors, whose sum is σ = 801021402. Its totient is φ = 801021400.

The previous prime is 801021373. The next prime is 801021407. The reversal of 801021401 is 104120108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428531401 + 372490000 = 20701^2 + 19300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801021401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 801021401.

It is not a weakly prime, because it can be changed into another prime (801021407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400510700 + 400510701.

It is an arithmetic number, because the mean of its divisors is an integer number (400510701).

Almost surely, 2^801021401 is an apocalyptic number.

It is an amenable number.

801021401 is a deficient number, since it is larger than the sum of its proper divisors (1).

801021401 is an equidigital number, since it uses as much as digits as its factorization.

801021401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 801021401 is about 28302.3214772216. The cubic root of 801021401 is about 928.7126756597.

Adding to 801021401 its reverse (104120108), we get a palindrome (905141509).

The spelling of 801021401 in words is "eight hundred one million, twenty-one thousand, four hundred one".