152981 has 2 divisors, whose sum is σ = 152982. Its totient is φ = 152980.

The previous prime is 152959. The next prime is 152989. The reversal of 152981 is 189251.

It is a happy number.

152981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152881 + 100 = 391^2 + 10^2 .

It is an emirp because it is prime and its reverse (189251) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152981 is a prime.

It is a super-2 number, since 2×152981² = 46806372722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 152981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76490 + 76491.

It is an arithmetic number, because the mean of its divisors is an integer number (76491).

2¹⁵²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

152981 is a deficient number, since it is larger than the sum of its proper divisors (1).

152981 is an equidigital number, since it uses as much as digits as its factorization.

152981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 26.

The square root of 152981 is about 391.1278563335. The cubic root of 152981 is about 53.4825983525.

The spelling of 152981 in words is "one hundred fifty-two thousand, nine hundred eighty-one".