25019641 has 2 divisors, whose sum is σ = 25019642. Its totient is φ = 25019640.

The previous prime is 25019629. The next prime is 25019647. The reversal of 25019641 is 14691052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 5659641 = 4400^2 + 2379^2 .

It is a cyclic number.

It is not a de Polignac number, because 25019641 - 2⁷ = 25019513 is a prime.

It is not a weakly prime, because it can be changed into another prime (25019647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12509820 + 12509821.

It is an arithmetic number, because the mean of its divisors is an integer number (12509821).

Almost surely, 2^25019641 is an apocalyptic number.

It is an amenable number.

25019641 is a deficient number, since it is larger than the sum of its proper divisors (1).

25019641 is an equidigital number, since it uses as much as digits as its factorization.

25019641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 25019641 is about 5001.9637143826. The cubic root of 25019641 is about 292.4783279533.

It can be divided in two parts, 250 and 19641, that added together give a palindrome (19891).

The spelling of 25019641 in words is "twenty-five million, nineteen thousand, six hundred forty-one".