149573 has 4 divisors (see below), whose sum is σ = 150348. Its totient is φ = 148800.

The previous prime is 149563. The next prime is 149579. The reversal of 149573 is 375941.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 375941 = 109 ⋅3449.

It can be written as a sum of positive squares in 2 ways, for example, as 124609 + 24964 = 353^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 149573 - 2¹⁰ = 148549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173 + ... + 573.

It is an arithmetic number, because the mean of its divisors is an integer number (37587).

2¹⁴⁹⁵⁷³ is an apocalyptic number.

It is an amenable number.

149573 is a deficient number, since it is larger than the sum of its proper divisors (775).

149573 is an equidigital number, since it uses as much as digits as its factorization.

149573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its digits is 3780, while the sum is 29.

The square root of 149573 is about 386.7466871222. The cubic root of 149573 is about 53.0824632975.

The spelling of 149573 in words is "one hundred forty-nine thousand, five hundred seventy-three".