25025921 has 8 divisors (see below), whose sum is σ = 26933544. Its totient is φ = 23166720.

The previous prime is 25025899. The next prime is 25025939. The reversal of 25025921 is 12952052.

It can be written as a sum of positive squares in 4 ways, for example, as 1123600 + 23902321 = 1060^2 + 4889^2 .

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 25025921 - 2¹⁸ = 24763777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25025941) 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, 11030 + ... + 13103.

It is an arithmetic number, because the mean of its divisors is an integer number (3366693).

Almost surely, 2^25025921 is an apocalyptic number.

It is an amenable number.

25025921 is a deficient number, since it is larger than the sum of its proper divisors (1907623).

25025921 is a wasteful number, since it uses less digits than its factorization.

25025921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24211.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 25025921 is about 5002.5914284499. The cubic root of 25025921 is about 292.5027968661.

Adding to 25025921 its reverse (12952052), we get a palindrome (37977973).

The spelling of 25025921 in words is "twenty-five million, twenty-five thousand, nine hundred twenty-one".