145229775 has 12 divisors (see below), whose sum is σ = 240113352. Its totient is φ = 77455840.

The previous prime is 145229771. The next prime is 145229801. The reversal of 145229775 is 577922541.

It is not a de Polignac number, because 145229775 - 2² = 145229771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145229771) 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 11 ways as a sum of consecutive naturals, for example, 968124 + ... + 968273.

It is an arithmetic number, because the mean of its divisors is an integer number (20009446).

Almost surely, 2^145229775 is an apocalyptic number.

145229775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145229775 is a deficient number, since it is larger than the sum of its proper divisors (94883577).

145229775 is a wasteful number, since it uses less digits than its factorization.

145229775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936410 (or 1936405 counting only the distinct ones).

The product of its digits is 176400, while the sum is 42.

The square root of 145229775 is about 12051.1316895966. The cubic root of 145229775 is about 525.6361449686.

The spelling of 145229775 in words is "one hundred forty-five million, two hundred twenty-nine thousand, seven hundred seventy-five".