25030561 has 2 divisors, whose sum is σ = 25030562. Its totient is φ = 25030560.

The previous prime is 25030519. The next prime is 25030571. The reversal of 25030561 is 16503052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14107536 + 10923025 = 3756^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 25030561 - 2¹³ = 25022369 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (25030571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12515280 + 12515281.

It is an arithmetic number, because the mean of its divisors is an integer number (12515281).

Almost surely, 2^25030561 is an apocalyptic number.

It is an amenable number.

25030561 is a deficient number, since it is larger than the sum of its proper divisors (1).

25030561 is an equidigital number, since it uses as much as digits as its factorization.

25030561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 25030561 is about 5003.0551665957. The cubic root of 25030561 is about 292.5208731787.

The spelling of 25030561 in words is "twenty-five million, thirty thousand, five hundred sixty-one".