4139557 has 2 divisors, whose sum is σ = 4139558. Its totient is φ = 4139556.

The previous prime is 4139539. The next prime is 4139573. The reversal of 4139557 is 7559314.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4137156 + 2401 = 2034^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 4139557 - 2¹¹ = 4137509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4139537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069778 + 2069779.

It is an arithmetic number, because the mean of its divisors is an integer number (2069779).

Almost surely, 2^4139557 is an apocalyptic number.

It is an amenable number.

4139557 is a deficient number, since it is larger than the sum of its proper divisors (1).

4139557 is an equidigital number, since it uses as much as digits as its factorization.

4139557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 34.

The square root of 4139557 is about 2034.5901307143. The cubic root of 4139557 is about 160.5651498723.

The spelling of 4139557 in words is "four million, one hundred thirty-nine thousand, five hundred fifty-seven".