10025581 has 4 divisors (see below), whose sum is σ = 10060092. Its totient is φ = 9991072.

The previous prime is 10025573. The next prime is 10025591. The reversal of 10025581 is 18552001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9548100 + 477481 = 3090^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 10025581 - 2³ = 10025573 is a prime.

It is a super-2 number, since 2×10025581² = 201024548775122, 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 (10025531) 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, 16816 + ... + 17401.

It is an arithmetic number, because the mean of its divisors is an integer number (2515023).

Almost surely, 2^10025581 is an apocalyptic number.

It is an amenable number.

10025581 is a deficient number, since it is larger than the sum of its proper divisors (34511).

10025581 is an equidigital number, since it uses as much as digits as its factorization.

10025581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34510.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 10025581 is about 3166.3197880189. The cubic root of 10025581 is about 215.6270212231.

Adding to 10025581 its reverse (18552001), we get a palindrome (28577582).

The spelling of 10025581 in words is "ten million, twenty-five thousand, five hundred eighty-one".