10125981 has 6 divisors (see below), whose sum is σ = 14626430. Its totient is φ = 6750648.

The previous prime is 10125979. The next prime is 10125989. The reversal of 10125981 is 18952101.

It can be written as a sum of positive squares in only one way, i.e., 9865881 + 260100 = 3141^2 + 510^2 .

It is not a de Polignac number, because 10125981 - 2¹ = 10125979 is a prime.

It is a super-2 number, since 2×10125981² = 205070982424722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10125989) 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, 562546 + ... + 562563.

Almost surely, 2^10125981 is an apocalyptic number.

It is an amenable number.

10125981 is a deficient number, since it is larger than the sum of its proper divisors (4500449).

10125981 is a wasteful number, since it uses less digits than its factorization.

10125981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125115 (or 1125112 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 10125981 is about 3182.1346608841. The cubic root of 10125981 is about 216.3444222184.

The spelling of 10125981 in words is "ten million, one hundred twenty-five thousand, nine hundred eighty-one".