25212001 has 2 divisors, whose sum is σ = 25212002. Its totient is φ = 25212000.

The previous prime is 25211999. The next prime is 25212013. The reversal of 25212001 is 10021252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23184225 + 2027776 = 4815^2 + 1424^2 .

It is a cyclic number.

It is not a de Polignac number, because 25212001 - 2¹ = 25211999 is a prime.

Together with 25211999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25212041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12606000 + 12606001.

It is an arithmetic number, because the mean of its divisors is an integer number (12606001).

Almost surely, 2^25212001 is an apocalyptic number.

It is an amenable number.

25212001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25212001 is an equidigital number, since it uses as much as digits as its factorization.

25212001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 25212001 is about 5021.1553451372. The cubic root of 25212001 is about 293.2259746870.

Adding to 25212001 its reverse (10021252), we get a palindrome (35233253).

The spelling of 25212001 in words is "twenty-five million, two hundred twelve thousand, one".