25141561 has 2 divisors, whose sum is σ = 25141562. Its totient is φ = 25141560.

The previous prime is 25141559. The next prime is 25141573. The reversal of 25141561 is 16514152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12673600 + 12467961 = 3560^2 + 3531^2 .

It is a cyclic number.

It is not a de Polignac number, because 25141561 - 2¹ = 25141559 is a prime.

Together with 25141559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25141591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12570780 + 12570781.

It is an arithmetic number, because the mean of its divisors is an integer number (12570781).

Almost surely, 2^25141561 is an apocalyptic number.

It is an amenable number.

25141561 is a deficient number, since it is larger than the sum of its proper divisors (1).

25141561 is an equidigital number, since it uses as much as digits as its factorization.

25141561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 25141561 is about 5014.1361170196. The cubic root of 25141561 is about 292.9526378811.

The spelling of 25141561 in words is "twenty-five million, one hundred forty-one thousand, five hundred sixty-one".