25196643 has 8 divisors (see below), whose sum is σ = 37328400. Its totient is φ = 16797744.

The previous prime is 25196579. The next prime is 25196651. The reversal of 25196643 is 34669152.

It is a happy number.

25196643 is a `hidden beast` number, since 2 + 5 + 1 + 9 + 6 + 643 = 666.

It is not a de Polignac number, because 25196643 - 2⁶ = 25196579 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 25196598 and 25196607.

It is not an unprimeable number, because it can be changed into a prime (25196683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466578 + ... + 466631.

It is an arithmetic number, because the mean of its divisors is an integer number (4666050).

Almost surely, 2^25196643 is an apocalyptic number.

25196643 is a deficient number, since it is larger than the sum of its proper divisors (12131757).

25196643 is an equidigital number, since it uses as much as digits as its factorization.

25196643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933218 (or 933212 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 25196643 is about 5019.6257828647. The cubic root of 25196643 is about 293.1664226342.

The spelling of 25196643 in words is "twenty-five million, one hundred ninety-six thousand, six hundred forty-three".