144531225 has 18 divisors (see below), whose sum is σ = 258871886. Its totient is φ = 77083200.

The previous prime is 144531209. The next prime is 144531239. The reversal of 144531225 is 522135441.

It can be written as a sum of positive squares in 3 ways, for example, as 23707161 + 120824064 = 4869^2 + 10992^2 .

It is not a de Polignac number, because 144531225 - 2⁴ = 144531209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 320956 + ... + 321405.

Almost surely, 2^144531225 is an apocalyptic number.

144531225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144531225 is a deficient number, since it is larger than the sum of its proper divisors (114340661).

144531225 is a wasteful number, since it uses less digits than its factorization.

144531225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642377 (or 642369 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 144531225 is about 12022.1139987941. The cubic root of 144531225 is about 524.7920264678.

Adding to 144531225 its reverse (522135441), we get a palindrome (666666666).

The spelling of 144531225 in words is "one hundred forty-four million, five hundred thirty-one thousand, two hundred twenty-five".