10661256 has 24 divisors (see below), whose sum is σ = 28874430. Its totient is φ = 3553728.

The previous prime is 10661249. The next prime is 10661263. The reversal of 10661256 is 65216601.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10661249) and next prime (10661263).

It can be written as a sum of positive squares in only one way, i.e., 10458756 + 202500 = 3234^2 + 450^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×10661256² = 227324758995072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73965 + ... + 74108.

Almost surely, 2^10661256 is an apocalyptic number.

It is an amenable number.

10661256 is an abundant number, since it is smaller than the sum of its proper divisors (18213174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10661256 is a wasteful number, since it uses less digits than its factorization.

10661256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148085 (or 148078 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 10661256 is about 3265.1578828596. The cubic root of 10661256 is about 220.0912569069.

Adding to 10661256 its reverse (65216601), we get a palindrome (75877857).

The spelling of 10661256 in words is "ten million, six hundred sixty-one thousand, two hundred fifty-six".