6401700421 has 8 divisors (see below), whose sum is σ = 6799932504. Its totient is φ = 6005875200.

The previous prime is 6401700337. The next prime is 6401700427. The reversal of 6401700421 is 1240071046.

It can be written as a sum of positive squares in 4 ways, for example, as 19448100 + 6382252321 = 4410^2 + 79889^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6401700421 - 2¹⁵ = 6401667653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401700427) 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, 596230 + ... + 606871.

It is an arithmetic number, because the mean of its divisors is an integer number (849991563).

Almost surely, 2^6401700421 is an apocalyptic number.

It is an amenable number.

6401700421 is a deficient number, since it is larger than the sum of its proper divisors (398232083).

6401700421 is a wasteful number, since it uses less digits than its factorization.

6401700421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203431.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 6401700421 is about 80010.6269254278. The cubic root of 6401700421 is about 1856.7999491998.

Adding to 6401700421 its reverse (1240071046), we get a palindrome (7641771467).

The spelling of 6401700421 in words is "six billion, four hundred one million, seven hundred thousand, four hundred twenty-one".