3906252561 has 8 divisors (see below), whose sum is σ = 5220422784. Its totient is φ = 2598125360.

The previous prime is 3906252551. The next prime is 3906252577. The reversal of 3906252561 is 1652526093.

3906252561 is digitally balanced in base 2 and base 4, because in such bases 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 3906252561 - 2⁵ = 3906252529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3906252551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509246 + ... + 1511831.

It is an arithmetic number, because the mean of its divisors is an integer number (652552848).

Almost surely, 2^3906252561 is an apocalyptic number.

It is an amenable number.

3906252561 is a deficient number, since it is larger than the sum of its proper divisors (1314170223).

3906252561 is a wasteful number, since it uses less digits than its factorization.

3906252561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3021511.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 3906252561 is about 62500.0204879966. The cubic root of 3906252561 is about 1574.9016565453.

The spelling of 3906252561 in words is "three billion, nine hundred six million, two hundred fifty-two thousand, five hundred sixty-one".