801401681 has 8 divisors (see below), whose sum is σ = 817102440. Its totient is φ = 785852928.

The previous prime is 801401669. The next prime is 801401693. The reversal of 801401681 is 186104108.

It is an interprime number because it is at equal distance from previous prime (801401669) and next prime (801401693).

It can be written as a sum of positive squares in 4 ways, for example, as 255712081 + 545689600 = 15991^2 + 23360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801401681 is a prime.

It is a super-2 number, since 2×801401681² = 1284489308619251522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (801401281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27326 + ... + 48471.

It is an arithmetic number, because the mean of its divisors is an integer number (102137805).

Almost surely, 2^801401681 is an apocalyptic number.

It is an amenable number.

801401681 is a deficient number, since it is larger than the sum of its proper divisors (15700759).

801401681 is a wasteful number, since it uses less digits than its factorization.

801401681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76003.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 801401681 is about 28309.0388568740. The cubic root of 801401681 is about 928.8596192920.

Adding to 801401681 its reverse (186104108), we get a palindrome (987505789).

The spelling of 801401681 in words is "eight hundred one million, four hundred one thousand, six hundred eighty-one".