25421111 has 2 divisors, whose sum is σ = 25421112. Its totient is φ = 25421110.

The previous prime is 25421093. The next prime is 25421119. The reversal of 25421111 is 11112452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25421111 - 2¹⁴ = 25404727 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25421111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25421119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12710555 + 12710556.

It is an arithmetic number, because the mean of its divisors is an integer number (12710556).

Almost surely, 2^25421111 is an apocalyptic number.

25421111 is a deficient number, since it is larger than the sum of its proper divisors (1).

25421111 is an equidigital number, since it uses as much as digits as its factorization.

25421111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80, while the sum is 17.

The square root of 25421111 is about 5041.9352435350. The cubic root of 25421111 is about 294.0344222118.

Adding to 25421111 its reverse (11112452), we get a palindrome (36533563).

The spelling of 25421111 in words is "twenty-five million, four hundred twenty-one thousand, one hundred eleven".