25460221 has 4 divisors (see below), whose sum is σ = 26081244. Its totient is φ = 24839200.

The previous prime is 25460177. The next prime is 25460233. The reversal of 25460221 is 12206452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9548100 + 15912121 = 3090^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 25460221 - 2¹³ = 25452029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25460192 and 25460201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25460291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310450 + ... + 310531.

It is an arithmetic number, because the mean of its divisors is an integer number (6520311).

Almost surely, 2^25460221 is an apocalyptic number.

It is an amenable number.

25460221 is a deficient number, since it is larger than the sum of its proper divisors (621023).

25460221 is an equidigital number, since it uses as much as digits as its factorization.

25460221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621022.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 25460221 is about 5045.8122240131. The cubic root of 25460221 is about 294.1851341394.

Adding to 25460221 its reverse (12206452), we get a palindrome (37666673).

The spelling of 25460221 in words is "twenty-five million, four hundred sixty thousand, two hundred twenty-one".