149345281 has 2 divisors, whose sum is σ = 149345282. Its totient is φ = 149345280.

The previous prime is 149345267. The next prime is 149345291. The reversal of 149345281 is 182543941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118919025 + 30426256 = 10905^2 + 5516^2 .

It is an emirp because it is prime and its reverse (182543941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149345281 is a prime.

It is a super-2 number, since 2×149345281² = 44608025913937922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 149345281.

It is not a weakly prime, because it can be changed into another prime (149345201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74672640 + 74672641.

It is an arithmetic number, because the mean of its divisors is an integer number (74672641).

Almost surely, 2^149345281 is an apocalyptic number.

It is an amenable number.

149345281 is a deficient number, since it is larger than the sum of its proper divisors (1).

149345281 is an equidigital number, since it uses as much as digits as its factorization.

149345281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 149345281 is about 12220.6906924281. The cubic root of 149345281 is about 530.5551096187. Note that the first 3 decimals are identical.

The spelling of 149345281 in words is "one hundred forty-nine million, three hundred forty-five thousand, two hundred eighty-one".