251425 has 12 divisors (see below), whose sum is σ = 318060. Its totient is φ = 197120.

The previous prime is 251417. The next prime is 251429. The reversal of 251425 is 524152.

251425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 88209 + 163216 = 297^2 + 404^2 .

It is not a de Polignac number, because 251425 - 2³ = 251417 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (251429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2169 + ... + 2281.

It is an arithmetic number, because the mean of its divisors is an integer number (26505).

2²⁵¹⁴²⁵ is an apocalyptic number.

251425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251425 is a deficient number, since it is larger than the sum of its proper divisors (66635).

251425 is a wasteful number, since it uses less digits than its factorization.

251425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 207 counting only the distinct ones).

The product of its digits is 400, while the sum is 19.

The square root of 251425 is about 501.4229751417. The cubic root of 251425 is about 63.1155182962.

Adding to 251425 its reverse (524152), we get a palindrome (775577).

It can be divided in two parts, 251 and 425, that added together give a palindrome (676).

The spelling of 251425 in words is "two hundred fifty-one thousand, four hundred twenty-five".