25432321 has 2 divisors, whose sum is σ = 25432322. Its totient is φ = 25432320.

The previous prime is 25432313. The next prime is 25432339. The reversal of 25432321 is 12323452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23415921 + 2016400 = 4839^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 25432321 - 2³ = 25432313 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 25432292 and 25432301.

It is not a weakly prime, because it can be changed into another prime (25432021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12716160 + 12716161.

It is an arithmetic number, because the mean of its divisors is an integer number (12716161).

Almost surely, 2^25432321 is an apocalyptic number.

It is an amenable number.

25432321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25432321 is an equidigital number, since it uses as much as digits as its factorization.

25432321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 22.

The square root of 25432321 is about 5043.0467973240. The cubic root of 25432321 is about 294.0776361832.

Adding to 25432321 its reverse (12323452), we get a palindrome (37755773).

The spelling of 25432321 in words is "twenty-five million, four hundred thirty-two thousand, three hundred twenty-one".