149122321 has 8 divisors (see below), whose sum is σ = 158434920. Its totient is φ = 140087808.

The previous prime is 149122319. The next prime is 149122327. The reversal of 149122321 is 123221941.

It can be written as a sum of positive squares in 4 ways, for example, as 10471696 + 138650625 = 3236^2 + 11775^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149122321 - 2¹ = 149122319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149122327) 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 in 7 ways as a sum of consecutive naturals, for example, 68416 + ... + 70561.

It is an arithmetic number, because the mean of its divisors is an integer number (19804365).

Almost surely, 2^149122321 is an apocalyptic number.

It is an amenable number.

149122321 is a deficient number, since it is larger than the sum of its proper divisors (9312599).

149122321 is a wasteful number, since it uses less digits than its factorization.

149122321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139043.

The product of its digits is 864, while the sum is 25.

The square root of 149122321 is about 12211.5650512127. The cubic root of 149122321 is about 530.2909533354.

The spelling of 149122321 in words is "one hundred forty-nine million, one hundred twenty-two thousand, three hundred twenty-one".