144158981 has 2 divisors, whose sum is σ = 144158982. Its totient is φ = 144158980.

The previous prime is 144158957. The next prime is 144159053. The reversal of 144158981 is 189851441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129026881 + 15132100 = 11359^2 + 3890^2 .

It is a cyclic number.

It is not a de Polignac number, because 144158981 - 2²⁶ = 77050117 is a prime.

It is a super-2 number, since 2×144158981² = 41563623605916722, 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 (144158941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72079490 + 72079491.

It is an arithmetic number, because the mean of its divisors is an integer number (72079491).

Almost surely, 2^144158981 is an apocalyptic number.

It is an amenable number.

144158981 is a deficient number, since it is larger than the sum of its proper divisors (1).

144158981 is an equidigital number, since it uses as much as digits as its factorization.

144158981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 41.

The square root of 144158981 is about 12006.6223810029. The cubic root of 144158981 is about 524.3411005317.

The spelling of 144158981 in words is "one hundred forty-four million, one hundred fifty-eight thousand, nine hundred eighty-one".