25552420 has 12 divisors (see below), whose sum is σ = 53660124. Its totient is φ = 10220960.

The previous prime is 25552399. The next prime is 25552427. The reversal of 25552420 is 2425552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5410276 + 20142144 = 2326^2 + 4488^2 .

It is not an unprimeable number, because it can be changed into a prime (25552427) 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, 638791 + ... + 638830.

It is an arithmetic number, because the mean of its divisors is an integer number (4471677).

Almost surely, 2^25552420 is an apocalyptic number.

25552420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25552420 is an abundant number, since it is smaller than the sum of its proper divisors (28107704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25552420 is a wasteful number, since it uses less digits than its factorization.

25552420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277630 (or 1277628 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 25552420 is about 5054.9401579049. The cubic root of 25552420 is about 294.5398168430.

Adding to 25552420 its reverse (2425552), we get a palindrome (27977972).

The spelling of 25552420 in words is "twenty-five million, five hundred fifty-two thousand, four hundred twenty".