145730705 has 4 divisors (see below), whose sum is σ = 174876852. Its totient is φ = 116584560.

The previous prime is 145730701. The next prime is 145730707. The reversal of 145730705 is 507037541.

145730705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84953089 + 60777616 = 9217^2 + 7796^2 .

It is not a de Polignac number, because 145730705 - 2² = 145730701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145730701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14573066 + ... + 14573075.

It is an arithmetic number, because the mean of its divisors is an integer number (43719213).

Almost surely, 2^145730705 is an apocalyptic number.

It is an amenable number.

145730705 is a deficient number, since it is larger than the sum of its proper divisors (29146147).

145730705 is an equidigital number, since it uses as much as digits as its factorization.

145730705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29146146.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 145730705 is about 12071.8973239504. The cubic root of 145730705 is about 526.2397970274.

The spelling of 145730705 in words is "one hundred forty-five million, seven hundred thirty thousand, seven hundred five".