3920651 has 4 divisors (see below), whose sum is σ = 4480752. Its totient is φ = 3360552.

The previous prime is 3920629. The next prime is 3920677. The reversal of 3920651 is 1560293.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3920651 - 2¹⁰ = 3919627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3920651.

It is not an unprimeable number, because it can be changed into a prime (3920681) 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 3 ways as a sum of consecutive naturals, for example, 280040 + ... + 280053.

It is an arithmetic number, because the mean of its divisors is an integer number (1120188).

Almost surely, 2^3920651 is an apocalyptic number.

3920651 is a deficient number, since it is larger than the sum of its proper divisors (560101).

3920651 is an equidigital number, since it uses as much as digits as its factorization.

3920651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560100.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 3920651 is about 1980.0633828239. The cubic root of 3920651 is about 157.6834312000.

The spelling of 3920651 in words is "three million, nine hundred twenty thousand, six hundred fifty-one".