145231225 has 12 divisors (see below), whose sum is σ = 184480380. Its totient is φ = 113350400.

The previous prime is 145231211. The next prime is 145231241. The reversal of 145231225 is 522132541.

It can be written as a sum of positive squares in 6 ways, for example, as 10949481 + 134281744 = 3309^2 + 11588^2 .

It is not a de Polignac number, because 145231225 - 2¹¹ = 145229177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 145231225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69820 + ... + 71869.

It is an arithmetic number, because the mean of its divisors is an integer number (15373365).

Almost surely, 2^145231225 is an apocalyptic number.

It is an amenable number.

145231225 is a deficient number, since it is larger than the sum of its proper divisors (39249155).

145231225 is a wasteful number, since it uses less digits than its factorization.

145231225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141740 (or 141735 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 145231225 is about 12051.1918497715. The cubic root of 145231225 is about 525.6378943111.

Adding to 145231225 its reverse (522132541), we get a palindrome (667363766).

The spelling of 145231225 in words is "one hundred forty-five million, two hundred thirty-one thousand, two hundred twenty-five".