25380919 has 4 divisors (see below), whose sum is σ = 25402896. Its totient is φ = 25358944.

The previous prime is 25380913. The next prime is 25380959. The reversal of 25380919 is 91908352.

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 25380919 - 2³ = 25380911 is a prime.

It is a super-2 number, since 2×25380919² = 1288382098569122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25380911) 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, 9154 + ... + 11599.

It is an arithmetic number, because the mean of its divisors is an integer number (6350724).

Almost surely, 2^25380919 is an apocalyptic number.

25380919 is a deficient number, since it is larger than the sum of its proper divisors (21977).

25380919 is a wasteful number, since it uses less digits than its factorization.

25380919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21976.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 25380919 is about 5037.9478957210. The cubic root of 25380919 is about 293.8793796153.

It can be divided in two parts, 253809 and 19, that added together give a triangular number (253828 = T₇₁₂).

The spelling of 25380919 in words is "twenty-five million, three hundred eighty thousand, nine hundred nineteen".