10125581 has 4 divisors (see below), whose sum is σ = 10147200. Its totient is φ = 10103964.

The previous prime is 10125569. The next prime is 10125601. The reversal of 10125581 is 18552101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18552101 = 1801 ⋅10301.

It is a cyclic number.

It is not a de Polignac number, because 10125581 - 2¹⁰ = 10124557 is a prime.

It is a super-2 number, since 2×10125581² = 205054781175122, 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 (10125541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10091 + ... + 11048.

It is an arithmetic number, because the mean of its divisors is an integer number (2536800).

Almost surely, 2^10125581 is an apocalyptic number.

It is an amenable number.

10125581 is a deficient number, since it is larger than the sum of its proper divisors (21619).

10125581 is an equidigital number, since it uses as much as digits as its factorization.

10125581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21618.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 10125581 is about 3182.0718093720. The cubic root of 10125581 is about 216.3415734768.

Adding to 10125581 its reverse (18552101), we get a palindrome (28677682).

The spelling of 10125581 in words is "ten million, one hundred twenty-five thousand, five hundred eighty-one".