25129397 has 2 divisors, whose sum is σ = 25129398. Its totient is φ = 25129396.

The previous prime is 25129373. The next prime is 25129411. The reversal of 25129397 is 79392152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14638276 + 10491121 = 3826^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 25129397 - 2⁶ = 25129333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25129397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25126397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12564698 + 12564699.

It is an arithmetic number, because the mean of its divisors is an integer number (12564699).

Almost surely, 2^25129397 is an apocalyptic number.

It is an amenable number.

25129397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25129397 is an equidigital number, since it uses as much as digits as its factorization.

25129397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 25129397 is about 5012.9229996081. The cubic root of 25129397 is about 292.9053847725.

The spelling of 25129397 in words is "twenty-five million, one hundred twenty-nine thousand, three hundred ninety-seven".