145237289 has 4 divisors (see below), whose sum is σ = 145603524. Its totient is φ = 144871056.

The previous prime is 145237277. The next prime is 145237297. The reversal of 145237289 is 982732541.

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 53173264 + 92064025 = 7292^2 + 9595^2 .

It is a cyclic number.

It is not a de Polignac number, because 145237289 - 2¹⁶ = 145171753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145237219) 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, 182522 + ... + 183315.

It is an arithmetic number, because the mean of its divisors is an integer number (36400881).

Almost surely, 2^145237289 is an apocalyptic number.

It is an amenable number.

145237289 is a deficient number, since it is larger than the sum of its proper divisors (366235).

145237289 is an equidigital number, since it uses as much as digits as its factorization.

145237289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366234.

The product of its digits is 120960, while the sum is 41.

The square root of 145237289 is about 12051.4434405178. The cubic root of 145237289 is about 525.6452100561.

It can be divided in two parts, 14523 and 7289, that added together give a palindrome (21812).

The spelling of 145237289 in words is "one hundred forty-five million, two hundred thirty-seven thousand, two hundred eighty-nine".