25123819 has 12 divisors (see below), whose sum is σ = 29366400. Its totient is φ = 21431088.

The previous prime is 25123801. The next prime is 25123837. The reversal of 25123819 is 91832152.

It is an interprime number because it is at equal distance from previous prime (25123801) and next prime (25123837).

It is a de Polignac number, because none of the positive numbers 2^k-25123819 is a prime.

It is a super-2 number, since 2×25123819² = 1262412562289522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25123619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10102 + ... + 12340.

It is an arithmetic number, because the mean of its divisors is an integer number (2447200).

Almost surely, 2^25123819 is an apocalyptic number.

25123819 is a deficient number, since it is larger than the sum of its proper divisors (4242581).

25123819 is a wasteful number, since it uses less digits than its factorization.

25123819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482 (or 2475 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 25123819 is about 5012.3666067039. The cubic root of 25123819 is about 292.8837109915.

The spelling of 25123819 in words is "twenty-five million, one hundred twenty-three thousand, eight hundred nineteen".