6834129421 has 24 divisors (see below), whose sum is σ = 8461360440. Its totient is φ = 5484552192.

The previous prime is 6834129389. The next prime is 6834129433. The reversal of 6834129421 is 1249214386.

It can be written as a sum of positive squares in 4 ways, for example, as 2774655625 + 4059473796 = 52675^2 + 63714^2 .

It is not a de Polignac number, because 6834129421 - 2⁵ = 6834129389 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 (6834129721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139515 + ... + 182023.

It is an arithmetic number, because the mean of its divisors is an integer number (352556685).

Almost surely, 2^6834129421 is an apocalyptic number.

It is an amenable number.

6834129421 is a deficient number, since it is larger than the sum of its proper divisors (1627231019).

6834129421 is a wasteful number, since it uses less digits than its factorization.

6834129421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42733 (or 42726 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 6834129421 is about 82668.7935136349. The cubic root of 6834129421 is about 1897.7007664124.

The spelling of 6834129421 in words is "six billion, eight hundred thirty-four million, one hundred twenty-nine thousand, four hundred twenty-one".