25138419 has 4 divisors (see below), whose sum is σ = 33517896. Its totient is φ = 16758944.

The previous prime is 25138391. The next prime is 25138439. The reversal of 25138419 is 91483152.

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

It is a cyclic number.

It is not a de Polignac number, because 25138419 - 2¹⁷ = 25007347 is a prime.

It is a super-2 number, since 2×25138419² = 1263880219639122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25138419.

It is not an unprimeable number, because it can be changed into a prime (25138439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4189734 + ... + 4189739.

It is an arithmetic number, because the mean of its divisors is an integer number (8379474).

Almost surely, 2^25138419 is an apocalyptic number.

25138419 is a deficient number, since it is larger than the sum of its proper divisors (8379477).

25138419 is an equidigital number, since it uses as much as digits as its factorization.

25138419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8379476.

The product of its digits is 8640, while the sum is 33.

The square root of 25138419 is about 5013.8227930393. The cubic root of 25138419 is about 292.9404337127.

The spelling of 25138419 in words is "twenty-five million, one hundred thirty-eight thousand, four hundred nineteen".