10356561 has 6 divisors (see below), whose sum is σ = 14959490. Its totient is φ = 6904368.

The previous prime is 10356551. The next prime is 10356607. The reversal of 10356561 is 16565301.

It is a happy number.

10356561 is a `hidden beast` number, since 1 + 0 + 3 + 5 + 656 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5267025 + 5089536 = 2295^2 + 2256^2 .

It is not a de Polignac number, because 10356561 - 2¹⁰ = 10355537 is a prime.

It is a super-3 number, since 3×10356561³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10356551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 575356 + ... + 575373.

Almost surely, 2^10356561 is an apocalyptic number.

It is an amenable number.

10356561 is a deficient number, since it is larger than the sum of its proper divisors (4602929).

10356561 is a wasteful number, since it uses less digits than its factorization.

10356561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150735 (or 1150732 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 10356561 is about 3218.1611208888. The cubic root of 10356561 is about 217.9742485644.

The spelling of 10356561 in words is "ten million, three hundred fifty-six thousand, five hundred sixty-one".