25531425 has 36 divisors (see below), whose sum is σ = 46614204. Its totient is φ = 13353600.

The previous prime is 25531423. The next prime is 25531427. The reversal of 25531425 is 52413552.

It is a happy number.

25531425 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (25531423) and next prime (25531427).

It can be written as a sum of positive squares in 6 ways, for example, as 1648656 + 23882769 = 1284^2 + 4887^2 .

It is not a de Polignac number, because 25531425 - 2¹ = 25531423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25531423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10855 + ... + 12995.

It is an arithmetic number, because the mean of its divisors is an integer number (1294839).

Almost surely, 2^25531425 is an apocalyptic number.

25531425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25531425 is a deficient number, since it is larger than the sum of its proper divisors (21082779).

25531425 is a wasteful number, since it uses less digits than its factorization.

25531425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210 (or 2202 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 25531425 is about 5052.8630497966. The cubic root of 25531425 is about 294.4591257529.

Adding to 25531425 its reverse (52413552), we get a palindrome (77944977).

The spelling of 25531425 in words is "twenty-five million, five hundred thirty-one thousand, four hundred twenty-five".