25421269 has 4 divisors (see below), whose sum is σ = 25561900. Its totient is φ = 25280640.

The previous prime is 25421267. The next prime is 25421281. The reversal of 25421269 is 96212452.

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 3378244 + 22043025 = 1838^2 + 4695^2 .

It is a cyclic number.

It is not a de Polignac number, because 25421269 - 2¹ = 25421267 is a prime.

It is a super-2 number, since 2×25421269² = 1292481835140722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25421269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25421261) 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, 70044 + ... + 70405.

It is an arithmetic number, because the mean of its divisors is an integer number (6390475).

Almost surely, 2^25421269 is an apocalyptic number.

It is an amenable number.

25421269 is a deficient number, since it is larger than the sum of its proper divisors (140631).

25421269 is a wasteful number, since it uses less digits than its factorization.

25421269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140630.

The product of its digits is 8640, while the sum is 31.

The square root of 25421269 is about 5041.9509120974. The cubic root of 25421269 is about 294.0350313819.

The spelling of 25421269 in words is "twenty-five million, four hundred twenty-one thousand, two hundred sixty-nine".