25289081 has 4 divisors (see below), whose sum is σ = 26776692. Its totient is φ = 23801472.

The previous prime is 25289063. The next prime is 25289101. The reversal of 25289081 is 18098252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15335056 + 9954025 = 3916^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 25289081 - 2¹⁴ = 25272697 is a prime.

It is a super-2 number, since 2×25289081² = 1279075235649122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25289041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743780 + ... + 743813.

It is an arithmetic number, because the mean of its divisors is an integer number (6694173).

Almost surely, 2^25289081 is an apocalyptic number.

It is an amenable number.

25289081 is a deficient number, since it is larger than the sum of its proper divisors (1487611).

25289081 is a wasteful number, since it uses less digits than its factorization.

25289081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487610.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 25289081 is about 5028.8250118691. The cubic root of 25289081 is about 293.5244947425.

The spelling of 25289081 in words is "twenty-five million, two hundred eighty-nine thousand, eighty-one".