25070321 has 8 divisors (see below), whose sum is σ = 25612200. Its totient is φ = 24534400.

The previous prime is 25070281. The next prime is 25070323. The reversal of 25070321 is 12307052.

It can be written as a sum of positive squares in 4 ways, for example, as 7639696 + 17430625 = 2764^2 + 4175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25070321 - 2¹⁸ = 24808177 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25070293 and 25070302.

It is not an unprimeable number, because it can be changed into a prime (25070323) 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, 7595 + ... + 10383.

It is an arithmetic number, because the mean of its divisors is an integer number (3201525).

Almost surely, 2^25070321 is an apocalyptic number.

It is an amenable number.

25070321 is a deficient number, since it is larger than the sum of its proper divisors (541879).

25070321 is a wasteful number, since it uses less digits than its factorization.

25070321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 25070321 is about 5007.0271618996. The cubic root of 25070321 is about 292.6756769682.

Adding to 25070321 its reverse (12307052), we get a palindrome (37377373).

The spelling of 25070321 in words is "twenty-five million, seventy thousand, three hundred twenty-one".