145250705 has 16 divisors (see below), whose sum is σ = 180694800. Its totient is φ = 111955200.

The previous prime is 145250701. The next prime is 145250719. The reversal of 145250705 is 507052541.

It is a Cunningham number, because it is equal to 12052²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1993744 + 143256961 = 1412^2 + 11969^2 .

It is not a de Polignac number, because 145250705 - 2² = 145250701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (145250701) 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 15 ways as a sum of consecutive naturals, for example, 100931 + ... + 102359.

It is an arithmetic number, because the mean of its divisors is an integer number (11293425).

Almost surely, 2^145250705 is an apocalyptic number.

It is an amenable number.

145250705 is a deficient number, since it is larger than the sum of its proper divisors (35444095).

145250705 is a wasteful number, since it uses less digits than its factorization.

145250705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 145250705 is about 12052.0000414869. Note that the first 4 decimals coincide. The cubic root of 145250705 is about 525.6613946945.

The spelling of 145250705 in words is "one hundred forty-five million, two hundred fifty thousand, seven hundred five".