25442101 has 2 divisors, whose sum is σ = 25442102. Its totient is φ = 25442100.

The previous prime is 25442093. The next prime is 25442119. The reversal of 25442101 is 10124452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14212900 + 11229201 = 3770^2 + 3351^2 .

It is a cyclic number.

It is not a de Polignac number, because 25442101 - 2³ = 25442093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25442161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12721050 + 12721051.

It is an arithmetic number, because the mean of its divisors is an integer number (12721051).

Almost surely, 2^25442101 is an apocalyptic number.

It is an amenable number.

25442101 is a deficient number, since it is larger than the sum of its proper divisors (1).

25442101 is an equidigital number, since it uses as much as digits as its factorization.

25442101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 25442101 is about 5044.0163560401. The cubic root of 25442101 is about 294.1153272076.

Adding to 25442101 its reverse (10124452), we get a palindrome (35566553).

The spelling of 25442101 in words is "twenty-five million, four hundred forty-two thousand, one hundred one".