25601559 has 4 divisors (see below), whose sum is σ = 34135416. Its totient is φ = 17067704.

The previous prime is 25601539. The next prime is 25601561. The reversal of 25601559 is 95510652.

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

It is a cyclic number.

It is not a de Polignac number, because 25601559 - 2¹³ = 25593367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25601509) 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, 4266924 + ... + 4266929.

It is an arithmetic number, because the mean of its divisors is an integer number (8533854).

Almost surely, 2^25601559 is an apocalyptic number.

25601559 is a deficient number, since it is larger than the sum of its proper divisors (8533857).

25601559 is an equidigital number, since it uses as much as digits as its factorization.

25601559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8533856.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 25601559 is about 5059.7983161387. The cubic root of 25601559 is about 294.7285024834.

The spelling of 25601559 in words is "twenty-five million, six hundred one thousand, five hundred fifty-nine".