145170745 has 4 divisors (see below), whose sum is σ = 174204900. Its totient is φ = 116136592.

The previous prime is 145170719. The next prime is 145170749. The reversal of 145170745 is 547071541.

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 100160064 + 45010681 = 10008^2 + 6709^2 .

It is a cyclic number.

It is not a de Polignac number, because 145170745 - 2⁷ = 145170617 is a prime.

It is a super-3 number, since 3×145170745³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145170745.

It is not an unprimeable number, because it can be changed into a prime (145170749) 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, 14517070 + ... + 14517079.

It is an arithmetic number, because the mean of its divisors is an integer number (43551225).

Almost surely, 2^145170745 is an apocalyptic number.

It is an amenable number.

145170745 is a deficient number, since it is larger than the sum of its proper divisors (29034155).

145170745 is an equidigital number, since it uses as much as digits as its factorization.

145170745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29034154.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 145170745 is about 12048.6822930974. The cubic root of 145170745 is about 525.5649187422.

The spelling of 145170745 in words is "one hundred forty-five million, one hundred seventy thousand, seven hundred forty-five".