25190101 has 2 divisors, whose sum is σ = 25190102. Its totient is φ = 25190100.

The previous prime is 25190063. The next prime is 25190117. The reversal of 25190101 is 10109152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22043025 + 3147076 = 4695^2 + 1774^2 .

It is a cyclic number.

It is not a de Polignac number, because 25190101 - 2⁷ = 25189973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25190171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12595050 + 12595051.

It is an arithmetic number, because the mean of its divisors is an integer number (12595051).

Almost surely, 2^25190101 is an apocalyptic number.

It is an amenable number.

25190101 is a deficient number, since it is larger than the sum of its proper divisors (1).

25190101 is an equidigital number, since it uses as much as digits as its factorization.

25190101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 25190101 is about 5018.9740983591. The cubic root of 25190101 is about 293.1410480801.

Adding to 25190101 its reverse (10109152), we get a palindrome (35299253).

The spelling of 25190101 in words is "twenty-five million, one hundred ninety thousand, one hundred one".