149558321 has 4 divisors (see below), whose sum is σ = 163154544. Its totient is φ = 135962100.

The previous prime is 149558317. The next prime is 149558341. The reversal of 149558321 is 123855941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123855941 = 11 ⋅11259631.

It is a cyclic number.

It is not a de Polignac number, because 149558321 - 2² = 149558317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149558341) 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 in 3 ways as a sum of consecutive naturals, for example, 6798095 + ... + 6798116.

It is an arithmetic number, because the mean of its divisors is an integer number (40788636).

Almost surely, 2^149558321 is an apocalyptic number.

149558321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

149558321 is a deficient number, since it is larger than the sum of its proper divisors (13596223).

149558321 is a wasteful number, since it uses less digits than its factorization.

149558321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13596222.

The product of its digits is 43200, while the sum is 38.

The square root of 149558321 is about 12229.4039511335. The cubic root of 149558321 is about 530.8072674754.

The spelling of 149558321 in words is "one hundred forty-nine million, five hundred fifty-eight thousand, three hundred twenty-one".