25000061 has 4 divisors (see below), whose sum is σ = 25011324. Its totient is φ = 24988800.

The previous prime is 25000033. The next prime is 25000069. The reversal of 25000061 is 16000052.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 24068836 + 931225 = 4906^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 25000061 - 2¹⁴ = 24983677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25000069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070 + ... + 7151.

It is an arithmetic number, because the mean of its divisors is an integer number (6252831).

Almost surely, 2^25000061 is an apocalyptic number.

It is an amenable number.

25000061 is a deficient number, since it is larger than the sum of its proper divisors (11263).

25000061 is an equidigital number, since it uses as much as digits as its factorization.

25000061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11262.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 25000061 is about 5000.0060999963. The cubic root of 25000061 is about 292.4020116412.

Subtracting from 25000061 its reverse (16000052), we obtain a palindrome (9000009).

The spelling of 25000061 in words is "twenty-five million, sixty-one", and thus it is an aban number and an uban number.