25435641 has 32 divisors (see below), whose sum is σ = 42624000. Its totient is φ = 13106880.

The previous prime is 25435633. The next prime is 25435649. The reversal of 25435641 is 14653452.

It is an interprime number because it is at equal distance from previous prime (25435633) and next prime (25435649).

It is not a de Polignac number, because 25435641 - 2³ = 25435633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25435599 and 25435608.

It is not an unprimeable number, because it can be changed into a prime (25435649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34050 + ... + 34788.

It is an arithmetic number, because the mean of its divisors is an integer number (1332000).

Almost surely, 2^25435641 is an apocalyptic number.

25435641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25435641 is a deficient number, since it is larger than the sum of its proper divisors (17188359).

25435641 is a wasteful number, since it uses less digits than its factorization.

25435641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909.

The product of its digits is 14400, while the sum is 30.

The square root of 25435641 is about 5043.3759526730. The cubic root of 25435641 is about 294.0904321744.

The spelling of 25435641 in words is "twenty-five million, four hundred thirty-five thousand, six hundred forty-one".