3705857 has 4 divisors (see below), whose sum is σ = 3721476. Its totient is φ = 3690240.

The previous prime is 3705853. The next prime is 3705887. The reversal of 3705857 is 7585073.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7585073 = 347 ⋅21859.

It can be written as a sum of positive squares in 2 ways, for example, as 3444736 + 261121 = 1856^2 + 511^2 .

It is a cyclic number.

It is not a de Polignac number, because 3705857 - 2² = 3705853 is a prime.

It is a super-2 number, since 2×3705857² = 27466752208898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3705851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7448 + ... + 7929.

It is an arithmetic number, because the mean of its divisors is an integer number (930369).

Almost surely, 2^3705857 is an apocalyptic number.

It is an amenable number.

3705857 is a deficient number, since it is larger than the sum of its proper divisors (15619).

3705857 is a wasteful number, since it uses less digits than its factorization.

3705857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15618.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 3705857 is about 1925.0602587971. The cubic root of 3705857 is about 154.7496061263.

The spelling of 3705857 in words is "three million, seven hundred five thousand, eight hundred fifty-seven".