6745974121 has 2 divisors, whose sum is σ = 6745974122. Its totient is φ = 6745974120.

The previous prime is 6745974107. The next prime is 6745974173. The reversal of 6745974121 is 1214795476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5193220096 + 1552754025 = 72064^2 + 39405^2 .

It is a cyclic number.

It is not a de Polignac number, because 6745974121 - 2²¹ = 6743876969 is a prime.

It is not a weakly prime, because it can be changed into another prime (6745974101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3372987060 + 3372987061.

It is an arithmetic number, because the mean of its divisors is an integer number (3372987061).

Almost surely, 2^6745974121 is an apocalyptic number.

It is an amenable number.

6745974121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6745974121 is an equidigital number, since it uses as much as digits as its factorization.

6745974121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 6745974121 is about 82133.8792521089. The cubic root of 6745974121 is about 1889.5057749574.

It can be divided in two parts, 674 and 5974121, that added together give a palindrome (5974795).

The spelling of 6745974121 in words is "six billion, seven hundred forty-five million, nine hundred seventy-four thousand, one hundred twenty-one".