25495643 has 2 divisors, whose sum is σ = 25495644. Its totient is φ = 25495642.

The previous prime is 25495633. The next prime is 25495747. The reversal of 25495643 is 34659452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25495643 - 2²⁰ = 24447067 is a prime.

It is equal to p_1594937 and since 25495643 and 1594937 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 25495597 and 25495606.

It is not a weakly prime, because it can be changed into another prime (25495633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12747821 + 12747822.

It is an arithmetic number, because the mean of its divisors is an integer number (12747822).

Almost surely, 2^25495643 is an apocalyptic number.

25495643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25495643 is an equidigital number, since it uses as much as digits as its factorization.

25495643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 38.

The square root of 25495643 is about 5049.3210434671. The cubic root of 25495643 is about 294.3215010746.

It can be divided in two parts, 2549 and 5643, that added together give a 13-th power (8192 = 2¹³).

The spelling of 25495643 in words is "twenty-five million, four hundred ninety-five thousand, six hundred forty-three".