25650491 has 2 divisors, whose sum is σ = 25650492. Its totient is φ = 25650490.

The previous prime is 25650473. The next prime is 25650511. The reversal of 25650491 is 19405652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25650491 - 2¹⁰ = 25649467 is a prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (25650991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12825245 + 12825246.

It is an arithmetic number, because the mean of its divisors is an integer number (12825246).

Almost surely, 2^25650491 is an apocalyptic number.

25650491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25650491 is an equidigital number, since it uses as much as digits as its factorization.

25650491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 25650491 is about 5064.6313784914. The cubic root of 25650491 is about 294.9161535146.

The spelling of 25650491 in words is "twenty-five million, six hundred fifty thousand, four hundred ninety-one".