25002001 has 2 divisors, whose sum is σ = 25002002. Its totient is φ = 25002000.

The previous prime is 25001993. The next prime is 25002037. The reversal of 25002001 is 10020052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24800400 + 201601 = 4980^2 + 449^2 .

It is a cyclic number.

It is not a de Polignac number, because 25002001 - 2³ = 25001993 is a prime.

It is not a weakly prime, because it can be changed into another prime (25002101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12501000 + 12501001.

It is an arithmetic number, because the mean of its divisors is an integer number (12501001).

Almost surely, 2^25002001 is an apocalyptic number.

It is an amenable number.

25002001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25002001 is an equidigital number, since it uses as much as digits as its factorization.

25002001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 25002001 is about 5000.2000959962. The cubic root of 25002001 is about 292.4095748925.

Adding to 25002001 its reverse (10020052), we get a palindrome (35022053).

The spelling of 25002001 in words is "twenty-five million, two thousand, one".