3421661243 has 16 divisors (see below), whose sum is σ = 4594119936. Its totient is φ = 2461134240.

The previous prime is 3421661237. The next prime is 3421661261.

3421661243 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 3421661243 - 2¹⁸ = 3421399099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3421661233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1708121 + ... + 1710122.

It is an arithmetic number, because the mean of its divisors is an integer number (287132496).

Almost surely, 2^3421661243 is an apocalyptic number.

3421661243 is a deficient number, since it is larger than the sum of its proper divisors (1172458693).

3421661243 is a wasteful number, since it uses less digits than its factorization.

3421661243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418274.

The product of its digits is 20736, while the sum is 32.

The square root of 3421661243 is about 58494.9676724417. The cubic root of 3421661243 is about 1506.8811615474.

It can be divided in two parts, 34216 and 61243, that added together give a palindrome (95459).

The spelling of 3421661243 in words is "three billion, four hundred twenty-one million, six hundred sixty-one thousand, two hundred forty-three".