25465643 has 24 divisors (see below), whose sum is σ = 33037200. Its totient is φ = 19450368.

The previous prime is 25465631. The next prime is 25465651. The reversal of 25465643 is 34656452.

It is a happy number.

It is not a de Polignac number, because 25465643 - 2⁶ = 25465579 is a prime.

It is a super-3 number, since 3×25465643³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25465603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15023 + ... + 16631.

It is an arithmetic number, because the mean of its divisors is an integer number (1376550).

Almost surely, 2^25465643 is an apocalyptic number.

25465643 is a deficient number, since it is larger than the sum of its proper divisors (7571557).

25465643 is a wasteful number, since it uses less digits than its factorization.

25465643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659 (or 1652 counting only the distinct ones).

The product of its digits is 86400, while the sum is 35.

The square root of 25465643 is about 5046.3494726386. The cubic root of 25465643 is about 294.2060158458.

It can be divided in two parts, 2 and 5465643, that added together give a palindrome (5465645).

The spelling of 25465643 in words is "twenty-five million, four hundred sixty-five thousand, six hundred forty-three".