145442237 has 2 divisors, whose sum is σ = 145442238. Its totient is φ = 145442236.

The previous prime is 145442203. The next prime is 145442249. The reversal of 145442237 is 732244541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73633561 + 71808676 = 8581^2 + 8474^2 .

It is a cyclic number.

It is not a de Polignac number, because 145442237 - 2⁸ = 145441981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145462237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72721118 + 72721119.

It is an arithmetic number, because the mean of its divisors is an integer number (72721119).

Almost surely, 2^145442237 is an apocalyptic number.

It is an amenable number.

145442237 is a deficient number, since it is larger than the sum of its proper divisors (1).

145442237 is an equidigital number, since it uses as much as digits as its factorization.

145442237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 32.

The square root of 145442237 is about 12059.9434907465. The cubic root of 145442237 is about 525.8923442494.

Adding to 145442237 its reverse (732244541), we get a palindrome (877686778).

The spelling of 145442237 in words is "one hundred forty-five million, four hundred forty-two thousand, two hundred thirty-seven".