25435381 has 4 divisors (see below), whose sum is σ = 25541164. Its totient is φ = 25329600.

The previous prime is 25435373. The next prime is 25435409. The reversal of 25435381 is 18353452.

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 21298225 + 4137156 = 4615^2 + 2034^2 .

It is a cyclic number.

It is not a de Polignac number, because 25435381 - 2³ = 25435373 is a prime.

It is a super-2 number, since 2×25435381² = 1293917213230322, 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 (25435321) 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, 52530 + ... + 53011.

It is an arithmetic number, because the mean of its divisors is an integer number (6385291).

Almost surely, 2^25435381 is an apocalyptic number.

It is an amenable number.

25435381 is a deficient number, since it is larger than the sum of its proper divisors (105783).

25435381 is a wasteful number, since it uses less digits than its factorization.

25435381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105782.

The product of its digits is 14400, while the sum is 31.

The square root of 25435381 is about 5043.3501762222. The cubic root of 25435381 is about 294.0894301189.

The spelling of 25435381 in words is "twenty-five million, four hundred thirty-five thousand, three hundred eighty-one".