25532421 has 8 divisors (see below), whose sum is σ = 34767744. Its totient is φ = 16659360.

The previous prime is 25532413. The next prime is 25532431. The reversal of 25532421 is 12423552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25532421 - 2³ = 25532413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25532391 and 25532400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25532401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90400 + ... + 90681.

It is an arithmetic number, because the mean of its divisors is an integer number (4345968).

Almost surely, 2^25532421 is an apocalyptic number.

It is an amenable number.

25532421 is a deficient number, since it is larger than the sum of its proper divisors (9235323).

25532421 is a wasteful number, since it uses less digits than its factorization.

25532421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181131.

The product of its digits is 2400, while the sum is 24.

The square root of 25532421 is about 5052.9616068203. The cubic root of 25532421 is about 294.4629547268.

Adding to 25532421 its reverse (12423552), we get a palindrome (37955973).

The spelling of 25532421 in words is "twenty-five million, five hundred thirty-two thousand, four hundred twenty-one".