25081481 has 2 divisors, whose sum is σ = 25081482. Its totient is φ = 25081480.

The previous prime is 25081471. The next prime is 25081487. The reversal of 25081481 is 18418052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20394256 + 4687225 = 4516^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 25081481 - 2⁶ = 25081417 is a prime.

It is a super-2 number, since 2×25081481² = 1258161378306722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25081487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12540740 + 12540741.

It is an arithmetic number, because the mean of its divisors is an integer number (12540741).

Almost surely, 2^25081481 is an apocalyptic number.

It is an amenable number.

25081481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25081481 is an equidigital number, since it uses as much as digits as its factorization.

25081481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 25081481 is about 5008.1414716439. The cubic root of 25081481 is about 292.7190985106.

The spelling of 25081481 in words is "twenty-five million, eighty-one thousand, four hundred eighty-one".