145549133 has 4 divisors (see below), whose sum is σ = 145881120. Its totient is φ = 145217148.

The previous prime is 145549099. The next prime is 145549153. The reversal of 145549133 is 331945541.

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: 331945541 = 5807 ⋅57163.

It is a cyclic number.

It is not a de Polignac number, because 145549133 - 2²⁶ = 78440269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 145549093 and 145549102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145549153) 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, 165335 + ... + 166212.

It is an arithmetic number, because the mean of its divisors is an integer number (36470280).

Almost surely, 2^145549133 is an apocalyptic number.

It is an amenable number.

145549133 is a deficient number, since it is larger than the sum of its proper divisors (331987).

145549133 is an equidigital number, since it uses as much as digits as its factorization.

145549133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331986.

The product of its digits is 32400, while the sum is 35.

The square root of 145549133 is about 12064.3745382842. The cubic root of 145549133 is about 526.0211514479.

The spelling of 145549133 in words is "one hundred forty-five million, five hundred forty-nine thousand, one hundred thirty-three".