145560109 has 4 divisors (see below), whose sum is σ = 149494204. Its totient is φ = 141626016.

The previous prime is 145560071. The next prime is 145560131. The reversal of 145560109 is 901065541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 901065541 = 101 ⋅8921441.

It can be written as a sum of positive squares in 2 ways, for example, as 111302500 + 34257609 = 10550^2 + 5853^2 .

It is a cyclic number.

It is not a de Polignac number, because 145560109 - 2¹⁵ = 145527341 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 (145560179) 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, 1966992 + ... + 1967065.

It is an arithmetic number, because the mean of its divisors is an integer number (37373551).

Almost surely, 2^145560109 is an apocalyptic number.

It is an amenable number.

145560109 is a deficient number, since it is larger than the sum of its proper divisors (3934095).

145560109 is an equidigital number, since it uses as much as digits as its factorization.

145560109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934094.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 145560109 is about 12064.8294227478. The cubic root of 145560109 is about 526.0343737024.

The spelling of 145560109 in words is "one hundred forty-five million, five hundred sixty thousand, one hundred nine".