3906157 has 6 divisors (see below), whose sum is σ = 3965802. Its totient is φ = 3847392.

The previous prime is 3906151. The next prime is 3906169. The reversal of 3906157 is 7516093.

It can be written as a sum of positive squares in 3 ways, for example, as 1929321 + 1976836 = 1389^2 + 1406^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3906157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4963 + ... + 5695.

It is an arithmetic number, because the mean of its divisors is an integer number (660967).

Almost surely, 2^3906157 is an apocalyptic number.

It is an amenable number.

3906157 is a deficient number, since it is larger than the sum of its proper divisors (59645).

3906157 is an frugal number, since it uses more digits than its factorization.

3906157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 3906157 is about 1976.4000101194. The cubic root of 3906157 is about 157.4888813853.

The spelling of 3906157 in words is "three million, nine hundred six thousand, one hundred fifty-seven".