144723545 has 4 divisors (see below), whose sum is σ = 173668260. Its totient is φ = 115778832.

The previous prime is 144723517. The next prime is 144723569. The reversal of 144723545 is 545327441.

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 66064384 + 78659161 = 8128^2 + 8869^2 .

It is a cyclic number.

It is not a de Polignac number, because 144723545 - 2⁸ = 144723289 is a prime.

It is an unprimeable number.

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, 14472350 + ... + 14472359.

It is an arithmetic number, because the mean of its divisors is an integer number (43417065).

Almost surely, 2^144723545 is an apocalyptic number.

It is an amenable number.

144723545 is a deficient number, since it is larger than the sum of its proper divisors (28944715).

144723545 is an equidigital number, since it uses as much as digits as its factorization.

144723545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28944714.

The product of its digits is 67200, while the sum is 35.

The square root of 144723545 is about 12030.1099329973. The cubic root of 144723545 is about 525.0246942277.

The spelling of 144723545 in words is "one hundred forty-four million, seven hundred twenty-three thousand, five hundred forty-five".