149503121 has 2 divisors, whose sum is σ = 149503122. Its totient is φ = 149503120.

The previous prime is 149503087. The next prime is 149503147. The reversal of 149503121 is 121305941.

It is an a-pointer prime, because the next prime (149503147) can be obtained adding 149503121 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77440000 + 72063121 = 8800^2 + 8489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149503121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (149503021) 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, 74751560 + 74751561.

It is an arithmetic number, because the mean of its divisors is an integer number (74751561).

Almost surely, 2^149503121 is an apocalyptic number.

It is an amenable number.

149503121 is a deficient number, since it is larger than the sum of its proper divisors (1).

149503121 is an equidigital number, since it uses as much as digits as its factorization.

149503121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 149503121 is about 12227.1468871524. The cubic root of 149503121 is about 530.7419547899.

The spelling of 149503121 in words is "one hundred forty-nine million, five hundred three thousand, one hundred twenty-one".