49145 has 4 divisors (see below), whose sum is σ = 58980. Its totient is φ = 39312.

The previous prime is 49139. The next prime is 49157. The reversal of 49145 is 54194.

It is a happy number.

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 32761 + 16384 = 181^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 49145 - 2⁶ = 49081 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 49145.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4910 + ... + 4919.

It is an arithmetic number, because the mean of its divisors is an integer number (14745).

2⁴⁹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

49145 is a deficient number, since it is larger than the sum of its proper divisors (9835).

49145 is an equidigital number, since it uses as much as digits as its factorization.

49145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9834.

The product of its digits is 720, while the sum is 23.

The square root of 49145 is about 221.6867158853. The cubic root of 49145 is about 36.6291167469.

The spelling of 49145 in words is "forty-nine thousand, one hundred forty-five".