25197901 has 2 divisors, whose sum is σ = 25197902. Its totient is φ = 25197900.

The previous prime is 25197899. The next prime is 25197917. The reversal of 25197901 is 10979152.

25197901 = 3549² + 3550².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 12595401 = 3550^2 + 3549^2 .

It is a cyclic number.

It is not a de Polignac number, because 25197901 - 2¹ = 25197899 is a prime.

Together with 25197899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25197301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12598950 + 12598951.

It is an arithmetic number, because the mean of its divisors is an integer number (12598951).

Almost surely, 2^25197901 is an apocalyptic number.

25197901 is the 3550-th centered square number.

It is an amenable number.

25197901 is a deficient number, since it is larger than the sum of its proper divisors (1).

25197901 is an equidigital number, since it uses as much as digits as its factorization.

25197901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 25197901 is about 5019.7510894466. The cubic root of 25197901 is about 293.1713015543.

The spelling of 25197901 in words is "twenty-five million, one hundred ninety-seven thousand, nine hundred one".