3521420972 has 18 divisors (see below), whose sum is σ = 6180183828. Its totient is φ = 1755660592.

The previous prime is 3521420963. The next prime is 3521420977. The reversal of 3521420972 is 2790241253.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3521420977) 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 5 ways as a sum of consecutive naturals, for example, 2564078 + ... + 2565450.

It is an arithmetic number, because the mean of its divisors is an integer number (343343546).

Almost surely, 2^3521420972 is an apocalyptic number.

It is an amenable number.

3521420972 is a deficient number, since it is larger than the sum of its proper divisors (2658762856).

3521420972 is an equidigital number, since it uses as much as digits as its factorization.

3521420972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 3521420972 is about 59341.5619275395. The cubic root of 3521420972 is about 1521.3856495307.

The spelling of 3521420972 in words is "three billion, five hundred twenty-one million, four hundred twenty thousand, nine hundred seventy-two".