25775501 has 2 divisors, whose sum is σ = 25775502. Its totient is φ = 25775500.

The previous prime is 25775483. The next prime is 25775513. The reversal of 25775501 is 10557752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23522500 + 2253001 = 4850^2 + 1501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25775501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25375501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12887750 + 12887751.

It is an arithmetic number, because the mean of its divisors is an integer number (12887751).

Almost surely, 2^25775501 is an apocalyptic number.

It is an amenable number.

25775501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25775501 is an equidigital number, since it uses as much as digits as its factorization.

25775501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 25775501 is about 5076.9578489485. The cubic root of 25775501 is about 295.3944775315.

The spelling of 25775501 in words is "twenty-five million, seven hundred seventy-five thousand, five hundred one".