145132237 has 4 divisors (see below), whose sum is σ = 147511516. Its totient is φ = 142752960.

The previous prime is 145132219. The next prime is 145132259. The reversal of 145132237 is 732231541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 732231541 = 179 ⋅4090679.

It can be written as a sum of positive squares in 2 ways, for example, as 24000201 + 121132036 = 4899^2 + 11006^2 .

It is a cyclic number.

It is not a de Polignac number, because 145132237 - 2¹⁵ = 145099469 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 (145132217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189548 + ... + 1189669.

It is an arithmetic number, because the mean of its divisors is an integer number (36877879).

Almost surely, 2^145132237 is an apocalyptic number.

It is an amenable number.

145132237 is a deficient number, since it is larger than the sum of its proper divisors (2379279).

145132237 is an equidigital number, since it uses as much as digits as its factorization.

145132237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379278.

The product of its digits is 5040, while the sum is 28.

The square root of 145132237 is about 12047.0841700388. The cubic root of 145132237 is about 525.5184441727.

Adding to 145132237 its reverse (732231541), we get a palindrome (877363778).

The spelling of 145132237 in words is "one hundred forty-five million, one hundred thirty-two thousand, two hundred thirty-seven".