25270381 has 4 divisors (see below), whose sum is σ = 26756892. Its totient is φ = 23783872.

The previous prime is 25270373. The next prime is 25270387. The reversal of 25270381 is 18307252.

25270381 = T₄₁₀₃ + T₄₁₀₄ + T₄₁₀₅.

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 17147881 + 8122500 = 4141^2 + 2850^2 .

It is a cyclic number.

It is not a de Polignac number, because 25270381 - 2³ = 25270373 is a prime.

It is a super-2 number, since 2×25270381² = 1277184311770322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25270387) 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, 743230 + ... + 743263.

It is an arithmetic number, because the mean of its divisors is an integer number (6689223).

Almost surely, 2^25270381 is an apocalyptic number.

25270381 is the 4105-th centered triangular number.

It is an amenable number.

25270381 is a deficient number, since it is larger than the sum of its proper divisors (1486511).

25270381 is a wasteful number, since it uses less digits than its factorization.

25270381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486510.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 25270381 is about 5026.9653867915. The cubic root of 25270381 is about 293.4521280488.

It can be divided in two parts, 25270 and 381, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 25270381 in words is "twenty-five million, two hundred seventy thousand, three hundred eighty-one".