145594237 has 2 divisors, whose sum is σ = 145594238. Its totient is φ = 145594236.

The previous prime is 145594217. The next prime is 145594271. The reversal of 145594237 is 732495541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142587481 + 3006756 = 11941^2 + 1734^2 .

It is a cyclic number.

It is not a de Polignac number, because 145594237 - 2²⁷ = 11376509 is a prime.

It is a super-2 number, since 2×145594237² = 42395363695224338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145594237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145594217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72797118 + 72797119.

It is an arithmetic number, because the mean of its divisors is an integer number (72797119).

Almost surely, 2^145594237 is an apocalyptic number.

It is an amenable number.

145594237 is a deficient number, since it is larger than the sum of its proper divisors (1).

145594237 is an equidigital number, since it uses as much as digits as its factorization.

145594237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 40.

The square root of 145594237 is about 12066.2436988485. The cubic root of 145594237 is about 526.0754818017.

The spelling of 145594237 in words is "one hundred forty-five million, five hundred ninety-four thousand, two hundred thirty-seven".