145555369 has 2 divisors, whose sum is σ = 145555370. Its totient is φ = 145555368.

The previous prime is 145555349. The next prime is 145555391. The reversal of 145555369 is 963555541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145082025 + 473344 = 12045^2 + 688^2 .

It is a cyclic number.

It is not a de Polignac number, because 145555369 - 2⁵ = 145555337 is a prime.

It is a super-2 number, since 2×145555369² = 42372730889452322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145555349) 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, 72777684 + 72777685.

It is an arithmetic number, because the mean of its divisors is an integer number (72777685).

Almost surely, 2^145555369 is an apocalyptic number.

It is an amenable number.

145555369 is a deficient number, since it is larger than the sum of its proper divisors (1).

145555369 is an equidigital number, since it uses as much as digits as its factorization.

145555369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 405000, while the sum is 43.

The square root of 145555369 is about 12064.6329823994. The cubic root of 145555369 is about 526.0286637360.

It can be divided in two parts, 145555 and 369, that added together give a square (145924 = 382²).

The spelling of 145555369 in words is "one hundred forty-five million, five hundred fifty-five thousand, three hundred sixty-nine".