145245105 has 12 divisors (see below), whose sum is σ = 251758260. Its totient is φ = 77464032.

The previous prime is 145245053. The next prime is 145245109. The reversal of 145245105 is 501542541.

145245105 is a `hidden beast` number, since 145 + 2 + 4 + 510 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 82137969 + 63107136 = 9063^2 + 7944^2 .

It is not a de Polignac number, because 145245105 - 2⁶ = 145245041 is a prime.

It is a super-3 number, since 3×145245105³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (145245109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1613790 + ... + 1613879.

It is an arithmetic number, because the mean of its divisors is an integer number (20979855).

Almost surely, 2^145245105 is an apocalyptic number.

145245105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145245105 is a deficient number, since it is larger than the sum of its proper divisors (106513155).

145245105 is a wasteful number, since it uses less digits than its factorization.

145245105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227680 (or 3227677 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 145245105 is about 12051.7677126636. The cubic root of 145245105 is about 525.6546391527.

Adding to 145245105 its reverse (501542541), we get a palindrome (646787646).

The spelling of 145245105 in words is "one hundred forty-five million, two hundred forty-five thousand, one hundred five".