25243489 has 4 divisors (see below), whose sum is σ = 26341056. Its totient is φ = 24145924.

The previous prime is 25243481. The next prime is 25243507. The reversal of 25243489 is 98434252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25243489 - 2³ = 25243481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25243481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548749 + ... + 548794.

It is an arithmetic number, because the mean of its divisors is an integer number (6585264).

Almost surely, 2^25243489 is an apocalyptic number.

It is an amenable number.

25243489 is a deficient number, since it is larger than the sum of its proper divisors (1097567).

25243489 is a wasteful number, since it uses less digits than its factorization.

25243489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097566.

The product of its digits is 69120, while the sum is 37.

The square root of 25243489 is about 5024.2899000754. The cubic root of 25243489 is about 293.3479967130.

The spelling of 25243489 in words is "twenty-five million, two hundred forty-three thousand, four hundred eighty-nine".