25042001 has 2 divisors, whose sum is σ = 25042002. Its totient is φ = 25042000.

The previous prime is 25041997. The next prime is 25042033. The reversal of 25042001 is 10024052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24403600 + 638401 = 4940^2 + 799^2 .

It is a cyclic number.

It is not a de Polignac number, because 25042001 - 2² = 25041997 is a prime.

It is not a weakly prime, because it can be changed into another prime (25042301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12521000 + 12521001.

It is an arithmetic number, because the mean of its divisors is an integer number (12521001).

Almost surely, 2^25042001 is an apocalyptic number.

It is an amenable number.

25042001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25042001 is an equidigital number, since it uses as much as digits as its factorization.

25042001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 25042001 is about 5004.1983373963. The cubic root of 25042001 is about 292.5654310972.

Adding to 25042001 its reverse (10024052), we get a palindrome (35066053).

The spelling of 25042001 in words is "twenty-five million, forty-two thousand, one".