145350521 has 2 divisors, whose sum is σ = 145350522. Its totient is φ = 145350520.

The previous prime is 145350511. The next prime is 145350533. The reversal of 145350521 is 125053541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135396496 + 9954025 = 11636^2 + 3155^2 .

It is an emirp because it is prime and its reverse (125053541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145350521 - 2²² = 141156217 is a prime.

It is a super-2 number, since 2×145350521² = 42253547909942882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145350511) 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, 72675260 + 72675261.

It is an arithmetic number, because the mean of its divisors is an integer number (72675261).

Almost surely, 2^145350521 is an apocalyptic number.

It is an amenable number.

145350521 is a deficient number, since it is larger than the sum of its proper divisors (1).

145350521 is an equidigital number, since it uses as much as digits as its factorization.

145350521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 145350521 is about 12056.1403857122. The cubic root of 145350521 is about 525.7817782833.

It can be divided in two parts, 14 and 5350521, that added together give a palindrome (5350535).

The spelling of 145350521 in words is "one hundred forty-five million, three hundred fifty thousand, five hundred twenty-one".