154045 has 4 divisors (see below), whose sum is σ = 184860. Its totient is φ = 123232.

The previous prime is 154043. The next prime is 154057. The reversal of 154045 is 540451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540451 = 101 ⋅5351.

It can be written as a sum of positive squares in 2 ways, for example, as 95481 + 58564 = 309^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 154045 - 2¹ = 154043 is a prime.

154045 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154043) 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, 15400 + ... + 15409.

It is an arithmetic number, because the mean of its divisors is an integer number (46215).

2¹⁵⁴⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

154045 is a deficient number, since it is larger than the sum of its proper divisors (30815).

154045 is an equidigital number, since it uses as much as digits as its factorization.

154045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30814.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 154045 is about 392.4856685282. The cubic root of 154045 is about 53.6063044860.

Adding to 154045 its reverse (540451), we get a palindrome (694496).

The spelling of 154045 in words is "one hundred fifty-four thousand, forty-five".