149875321 has 4 divisors (see below), whose sum is σ = 149998500. Its totient is φ = 149752144.

The previous prime is 149875309. The next prime is 149875331. The reversal of 149875321 is 123578941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97515625 + 52359696 = 9875^2 + 7236^2 .

It is a cyclic number.

It is not a de Polignac number, because 149875321 - 2⁵ = 149875289 is a prime.

It is a super-2 number, since 2×149875321² = 44925223689706082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149875331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59746 + ... + 62203.

It is an arithmetic number, because the mean of its divisors is an integer number (37499625).

Almost surely, 2^149875321 is an apocalyptic number.

It is an amenable number.

149875321 is a deficient number, since it is larger than the sum of its proper divisors (123179).

149875321 is a wasteful number, since it uses less digits than its factorization.

149875321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123178.

The product of its digits is 60480, while the sum is 40.

The square root of 149875321 is about 12242.3576569221. The cubic root of 149875321 is about 531.1820313321.

The spelling of 149875321 in words is "one hundred forty-nine million, eight hundred seventy-five thousand, three hundred twenty-one".