25601399 has 2 divisors, whose sum is σ = 25601400. Its totient is φ = 25601398.

The previous prime is 25601377. The next prime is 25601423. The reversal of 25601399 is 99310652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25601399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25604399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12800699 + 12800700.

It is an arithmetic number, because the mean of its divisors is an integer number (12800700).

Almost surely, 2^25601399 is an apocalyptic number.

25601399 is a deficient number, since it is larger than the sum of its proper divisors (1).

25601399 is an equidigital number, since it uses as much as digits as its factorization.

25601399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 25601399 is about 5059.7825052071. The cubic root of 25601399 is about 294.7278885018.

The spelling of 25601399 in words is "twenty-five million, six hundred one thousand, three hundred ninety-nine".