145835381 has 2 divisors, whose sum is σ = 145835382. Its totient is φ = 145835380.

The previous prime is 145835369. The next prime is 145835413. The reversal of 145835381 is 183538541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126112900 + 19722481 = 11230^2 + 4441^2 .

It is a cyclic number.

It is not a de Polignac number, because 145835381 - 2¹⁰ = 145834357 is a prime.

It is a super-2 number, since 2×145835381² = 42535916702830322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145835321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72917690 + 72917691.

It is an arithmetic number, because the mean of its divisors is an integer number (72917691).

Almost surely, 2^145835381 is an apocalyptic number.

It is an amenable number.

145835381 is a deficient number, since it is larger than the sum of its proper divisors (1).

145835381 is an equidigital number, since it uses as much as digits as its factorization.

145835381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 38.

The square root of 145835381 is about 12076.2320696482. The cubic root of 145835381 is about 526.3657633739.

The spelling of 145835381 in words is "one hundred forty-five million, eight hundred thirty-five thousand, three hundred eighty-one".