4091656 has 8 divisors (see below), whose sum is σ = 7671870. Its totient is φ = 2045824.

The previous prime is 4091627. The next prime is 4091657. The reversal of 4091656 is 6561904.

It can be written as a sum of positive squares in only one way, i.e., 3648100 + 443556 = 1910^2 + 666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255721 + ... + 255736.

Almost surely, 2^4091656 is an apocalyptic number.

It is an amenable number.

4091656 is a deficient number, since it is larger than the sum of its proper divisors (3580214).

4091656 is a wasteful number, since it uses less digits than its factorization.

4091656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511463 (or 511459 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 4091656 is about 2022.7842198317. The cubic root of 4091656 is about 159.9434174925.

The spelling of 4091656 in words is "four million, ninety-one thousand, six hundred fifty-six".