25001231 has 2 divisors, whose sum is σ = 25001232. Its totient is φ = 25001230.

The previous prime is 25001201. The next prime is 25001239. The reversal of 25001231 is 13210052.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25001231 - 2⁶ = 25001167 is a prime.

It is a super-2 number, since 2×25001231² = 1250123103030722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25001239) 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, 12500615 + 12500616.

It is an arithmetic number, because the mean of its divisors is an integer number (12500616).

Almost surely, 2^25001231 is an apocalyptic number.

25001231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25001231 is an equidigital number, since it uses as much as digits as its factorization.

25001231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 25001231 is about 5000.1230984847. The cubic root of 25001231 is about 292.4065730303.

Adding to 25001231 its reverse (13210052), we get a palindrome (38211283).

The spelling of 25001231 in words is "twenty-five million, one thousand, two hundred thirty-one".