145442025 has 36 divisors (see below), whose sum is σ = 261351948. Its totient is φ = 77316480.

The previous prime is 145441999. The next prime is 145442027. The reversal of 145442025 is 520244541.

145442025 is a `hidden beast` number, since 1 + 454 + 4 + 202 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 3164841 + 142277184 = 1779^2 + 11928^2 .

It is not a de Polignac number, because 145442025 - 2⁵ = 145441993 is a prime.

It is a super-2 number, since 2×145442025² = 42306765272201250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145442025.

It is not an unprimeable number, because it can be changed into a prime (145442027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 83059 + ... + 84791.

Almost surely, 2^145442025 is an apocalyptic number.

145442025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145442025 is a deficient number, since it is larger than the sum of its proper divisors (115909923).

145442025 is a wasteful number, since it uses less digits than its factorization.

145442025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122 (or 2114 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 145442025 is about 12059.9347013158. The cubic root of 145442025 is about 525.8920887316.

Adding to 145442025 its reverse (520244541), we get a palindrome (665686566).

The spelling of 145442025 in words is "one hundred forty-five million, four hundred forty-two thousand, twenty-five".