7856961 has 16 divisors (see below), whose sum is σ = 12493824. Its totient is φ = 4294224.

The previous prime is 7856957. The next prime is 7856963. The reversal of 7856961 is 1696587.

It is not a de Polignac number, because 7856961 - 2² = 7856957 is a prime.

It is an alternating number because its digits alternate between odd and even.

7856961 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7856963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7651 + ... + 8616.

It is an arithmetic number, because the mean of its divisors is an integer number (780864).

Almost surely, 2^7856961 is an apocalyptic number.

It is an amenable number.

7856961 is a deficient number, since it is larger than the sum of its proper divisors (4636863).

7856961 is a wasteful number, since it uses less digits than its factorization.

7856961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16300.

The product of its digits is 90720, while the sum is 42.

The square root of 7856961 is about 2803.0271136755. The cubic root of 7856961 is about 198.8008326922.

The spelling of 7856961 in words is "seven million, eight hundred fifty-six thousand, nine hundred sixty-one".