25734321 has 16 divisors (see below), whose sum is σ = 38404800. Its totient is φ = 17030304.

The previous prime is 25734301. The next prime is 25734323. The reversal of 25734321 is 12343752.

It is not a de Polignac number, because 25734321 - 2¹⁵ = 25701553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25734323) 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 15 ways as a sum of consecutive naturals, for example, 325 + ... + 7181.

It is an arithmetic number, because the mean of its divisors is an integer number (2400300).

Almost surely, 2^25734321 is an apocalyptic number.

It is an amenable number.

25734321 is a deficient number, since it is larger than the sum of its proper divisors (12670479).

25734321 is a wasteful number, since it uses less digits than its factorization.

25734321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7005 (or 6999 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 25734321 is about 5072.9006495298. The cubic root of 25734321 is about 295.2370822277.

The spelling of 25734321 in words is "twenty-five million, seven hundred thirty-four thousand, three hundred twenty-one".