25730121 has 8 divisors (see below), whose sum is σ = 34640320. Its totient is φ = 16986672.

The previous prime is 25730099. The next prime is 25730137. The reversal of 25730121 is 12103752.

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

It is not a de Polignac number, because 25730121 - 2⁶ = 25730057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25730021) 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, 41326 + ... + 41943.

It is an arithmetic number, because the mean of its divisors is an integer number (4330040).

Almost surely, 2^25730121 is an apocalyptic number.

It is an amenable number.

25730121 is a deficient number, since it is larger than the sum of its proper divisors (8910199).

25730121 is a wasteful number, since it uses less digits than its factorization.

25730121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83375.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 25730121 is about 5072.4866682920. The cubic root of 25730121 is about 295.2210198493.

Adding to 25730121 its reverse (12103752), we get a palindrome (37833873).

The spelling of 25730121 in words is "twenty-five million, seven hundred thirty thousand, one hundred twenty-one".