25362421 has 4 divisors (see below), whose sum is σ = 28985632. Its totient is φ = 21739212.

The previous prime is 25362401. The next prime is 25362431. The reversal of 25362421 is 12426352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25362421 - 2¹¹ = 25360373 is a prime.

It is a super-3 number, since 3×25362421³ (a number of 23 digits) contains 333 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 (25362401) 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, 1811595 + ... + 1811608.

It is an arithmetic number, because the mean of its divisors is an integer number (7246408).

Almost surely, 2^25362421 is an apocalyptic number.

It is an amenable number.

25362421 is a deficient number, since it is larger than the sum of its proper divisors (3623211).

25362421 is an equidigital number, since it uses as much as digits as its factorization.

25362421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623210.

The product of its digits is 2880, while the sum is 25.

The square root of 25362421 is about 5036.1116945517. Note that the first 3 decimals coincide. The cubic root of 25362421 is about 293.8079676758.

Adding to 25362421 its reverse (12426352), we get a palindrome (37788773).

The spelling of 25362421 in words is "twenty-five million, three hundred sixty-two thousand, four hundred twenty-one".