4139657 has 8 divisors (see below), whose sum is σ = 4225320. Its totient is φ = 4055040.

The previous prime is 4139627. The next prime is 4139659. The reversal of 4139657 is 7569314.

It can be written as a sum of positive squares in 4 ways, for example, as 203401 + 3936256 = 451^2 + 1984^2 .

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 4139657 - 2⁶ = 4139593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4139659) 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, 17057 + ... + 17297.

It is an arithmetic number, because the mean of its divisors is an integer number (528165).

Almost surely, 2^4139657 is an apocalyptic number.

It is an amenable number.

4139657 is a deficient number, since it is larger than the sum of its proper divisors (85663).

4139657 is a wasteful number, since it uses less digits than its factorization.

4139657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523.

The product of its digits is 22680, while the sum is 35.

The square root of 4139657 is about 2034.6147055401. The cubic root of 4139657 is about 160.5664427953.

The spelling of 4139657 in words is "four million, one hundred thirty-nine thousand, six hundred fifty-seven".