25716013 has 4 divisors (see below), whose sum is σ = 25828540. Its totient is φ = 25603488.

The previous prime is 25715983. The next prime is 25716017. The reversal of 25716013 is 31061752.

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 18301284 + 7414729 = 4278^2 + 2723^2 .

It is a cyclic number.

It is not a de Polignac number, because 25716013 - 2¹³ = 25707821 is a prime.

It is a super-2 number, since 2×25716013² = 1322626649232338, 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 (25716017) 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 3 ways as a sum of consecutive naturals, for example, 55920 + ... + 56377.

It is an arithmetic number, because the mean of its divisors is an integer number (6457135).

Almost surely, 2^25716013 is an apocalyptic number.

It is an amenable number.

25716013 is a deficient number, since it is larger than the sum of its proper divisors (112527).

25716013 is a wasteful number, since it uses less digits than its factorization.

25716013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112526.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 25716013 is about 5071.0958381794. The cubic root of 25716013 is about 295.1670527549.

Adding to 25716013 its reverse (31061752), we get a palindrome (56777765).

The spelling of 25716013 in words is "twenty-five million, seven hundred sixteen thousand, thirteen".