3900557 has 4 divisors (see below), whose sum is σ = 3917820. Its totient is φ = 3883296.

The previous prime is 3900517. The next prime is 3900563. The reversal of 3900557 is 7550093.

3900557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7550093 = 877 ⋅8609.

It can be written as a sum of positive squares in 2 ways, for example, as 2390116 + 1510441 = 1546^2 + 1229^2 .

It is a cyclic number.

It is not a de Polignac number, because 3900557 - 2¹² = 3896461 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8288 + ... + 8745.

It is an arithmetic number, because the mean of its divisors is an integer number (979455).

Almost surely, 2^3900557 is an apocalyptic number.

It is an amenable number.

3900557 is a deficient number, since it is larger than the sum of its proper divisors (17263).

3900557 is a wasteful number, since it uses less digits than its factorization.

3900557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17262.

The product of its (nonzero) digits is 4725, while the sum is 29.

The square root of 3900557 is about 1974.9827847351. The cubic root of 3900557 is about 157.4135849127.

The spelling of 3900557 in words is "three million, nine hundred thousand, five hundred fifty-seven".