10556861 has 8 divisors (see below), whose sum is σ = 12086784. Its totient is φ = 9032400.

The previous prime is 10556851. The next prime is 10556867. The reversal of 10556861 is 16865501.

It is a happy number.

10556861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10556861 - 2⁶ = 10556797 is a prime.

It is a super-2 number, since 2×10556861² = 222894628346642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10556867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4436 + ... + 6386.

It is an arithmetic number, because the mean of its divisors is an integer number (1510848).

Almost surely, 2^10556861 is an apocalyptic number.

It is an amenable number.

10556861 is a deficient number, since it is larger than the sum of its proper divisors (1529923).

10556861 is an equidigital number, since it uses as much as digits as its factorization.

10556861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 10556861 is about 3249.1323457194. The cubic root of 10556861 is about 219.3705215494.

It can be divided in two parts, 10556 and 861, that multiplied together give a triangular number (9088716 = T₄₂₆₃).

The spelling of 10556861 in words is "ten million, five hundred fifty-six thousand, eight hundred sixty-one".