3420667521 has 12 divisors (see below), whose sum is σ = 4952705940. Its totient is φ = 2275025760.

The previous prime is 3420667519. The next prime is 3420667553. The reversal of 3420667521 is 1257660243.

It can be written as a sum of positive squares in 2 ways, for example, as 1767025296 + 1653642225 = 42036^2 + 40665^2 .

It is not a de Polignac number, because 3420667521 - 2¹ = 3420667519 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3420660521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 447606 + ... + 455183.

It is an arithmetic number, because the mean of its divisors is an integer number (412725495).

Almost surely, 2^3420667521 is an apocalyptic number.

It is an amenable number.

3420667521 is a deficient number, since it is larger than the sum of its proper divisors (1532038419).

3420667521 is a wasteful number, since it uses less digits than its factorization.

3420667521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903216 (or 903213 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 3420667521 is about 58486.4729745263. The cubic root of 3420667521 is about 1506.7352708198.

The spelling of 3420667521 in words is "three billion, four hundred twenty million, six hundred sixty-seven thousand, five hundred twenty-one".