145614181 has 2 divisors, whose sum is σ = 145614182. Its totient is φ = 145614180.

The previous prime is 145614109. The next prime is 145614193. The reversal of 145614181 is 181416541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102921025 + 42693156 = 10145^2 + 6534^2 .

It is a cyclic number.

It is not a de Polignac number, because 145614181 - 2²⁷ = 11396453 is a prime.

It is a super-2 number, since 2×145614181² = 42406979416601522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145614101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72807090 + 72807091.

It is an arithmetic number, because the mean of its divisors is an integer number (72807091).

Almost surely, 2^145614181 is an apocalyptic number.

It is an amenable number.

145614181 is a deficient number, since it is larger than the sum of its proper divisors (1).

145614181 is an equidigital number, since it uses as much as digits as its factorization.

145614181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 31.

The square root of 145614181 is about 12067.0701083569. The cubic root of 145614181 is about 526.0995019154.

The spelling of 145614181 in words is "one hundred forty-five million, six hundred fourteen thousand, one hundred eighty-one".