145532113 has 4 divisors (see below), whose sum is σ = 146867380. Its totient is φ = 144196848.

The previous prime is 145532111. The next prime is 145532129. The reversal of 145532113 is 311235541.

It is a happy number.

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 111344704 + 34187409 = 10552^2 + 5847^2 .

It is a cyclic number.

It is not a de Polignac number, because 145532113 - 2¹ = 145532111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145532111) 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, 667470 + ... + 667687.

It is an arithmetic number, because the mean of its divisors is an integer number (36716845).

Almost surely, 2^145532113 is an apocalyptic number.

It is an amenable number.

145532113 is a deficient number, since it is larger than the sum of its proper divisors (1335267).

145532113 is a wasteful number, since it uses less digits than its factorization.

145532113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335266.

The product of its digits is 1800, while the sum is 25.

The square root of 145532113 is about 12063.6691350517. The cubic root of 145532113 is about 526.0006469653. Note that the first 3 decimals are identical.

Adding to 145532113 its reverse (311235541), we get a palindrome (456767654).

The spelling of 145532113 in words is "one hundred forty-five million, five hundred thirty-two thousand, one hundred thirteen".