145775047 has 16 divisors (see below), whose sum is σ = 161126784. Its totient is φ = 130788000.

The previous prime is 145775041. The next prime is 145775089. The reversal of 145775047 is 740577541.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 145775047 - 2⁷ = 145774919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145775041) 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 15 ways as a sum of consecutive naturals, for example, 419928 + ... + 420274.

It is an arithmetic number, because the mean of its divisors is an integer number (10070424).

Almost surely, 2^145775047 is an apocalyptic number.

145775047 is a deficient number, since it is larger than the sum of its proper divisors (15351737).

145775047 is a wasteful number, since it uses less digits than its factorization.

145775047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750.

The product of its (nonzero) digits is 137200, while the sum is 40.

The square root of 145775047 is about 12073.7337638363. The cubic root of 145775047 is about 526.2931652333.

The spelling of 145775047 in words is "one hundred forty-five million, seven hundred seventy-five thousand, forty-seven".