3540947521 has 8 divisors (see below), whose sum is σ = 3782946080. Its totient is φ = 3304512288.

The previous prime is 3540947507. The next prime is 3540947539. The reversal of 3540947521 is 1257490453.

It is a happy number.

3540947521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3540947521 - 2⁵ = 3540947489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3540947551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389516 + ... + 1392061.

It is an arithmetic number, because the mean of its divisors is an integer number (472868260).

Almost surely, 2^3540947521 is an apocalyptic number.

It is an amenable number.

3540947521 is a deficient number, since it is larger than the sum of its proper divisors (241998559).

3540947521 is a wasteful number, since it uses less digits than its factorization.

3540947521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781663.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 3540947521 is about 59505.8612323190. The cubic root of 3540947521 is about 1524.1925344260.

The spelling of 3540947521 in words is "three billion, five hundred forty million, nine hundred forty-seven thousand, five hundred twenty-one".