145330253 has 2 divisors, whose sum is σ = 145330254. Its totient is φ = 145330252.

The previous prime is 145330099. The next prime is 145330267. The reversal of 145330253 is 352033541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143472484 + 1857769 = 11978^2 + 1363^2 .

It is an emirp because it is prime and its reverse (352033541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145330253 - 2¹⁴ = 145313869 is a prime.

It is a super-2 number, since 2×145330253² = 42241764874088018, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145350253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72665126 + 72665127.

It is an arithmetic number, because the mean of its divisors is an integer number (72665127).

Almost surely, 2^145330253 is an apocalyptic number.

It is an amenable number.

145330253 is a deficient number, since it is larger than the sum of its proper divisors (1).

145330253 is an equidigital number, since it uses as much as digits as its factorization.

145330253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 145330253 is about 12055.2997888895. The cubic root of 145330253 is about 525.7573384203.

Adding to 145330253 its reverse (352033541), we get a palindrome (497363794).

The spelling of 145330253 in words is "one hundred forty-five million, three hundred thirty thousand, two hundred fifty-three".