25601011 has 2 divisors, whose sum is σ = 25601012. Its totient is φ = 25601010.

The previous prime is 25600973. The next prime is 25601021. The reversal of 25601011 is 11010652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25601011 is a prime.

It is not a weakly prime, because it can be changed into another prime (25601021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12800505 + 12800506.

It is an arithmetic number, because the mean of its divisors is an integer number (12800506).

Almost surely, 2^25601011 is an apocalyptic number.

25601011 is a deficient number, since it is larger than the sum of its proper divisors (1).

25601011 is an equidigital number, since it uses as much as digits as its factorization.

25601011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 25601011 is about 5059.7441634929. The cubic root of 25601011 is about 294.7263995858.

Adding to 25601011 its reverse (11010652), we get a palindrome (36611663).

The spelling of 25601011 in words is "twenty-five million, six hundred one thousand, eleven".