144421775 has 6 divisors (see below), whose sum is σ = 179083032. Its totient is φ = 115537400.

The previous prime is 144421757. The next prime is 144421789. The reversal of 144421775 is 577124441.

It is a de Polignac number, because none of the positive numbers 2^k-144421775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2888411 + ... + 2888460.

It is an arithmetic number, because the mean of its divisors is an integer number (29847172).

Almost surely, 2^144421775 is an apocalyptic number.

144421775 is a deficient number, since it is larger than the sum of its proper divisors (34661257).

144421775 is an equidigital number, since it uses as much as digits as its factorization.

144421775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5776881 (or 5776876 counting only the distinct ones).

The product of its digits is 31360, while the sum is 35.

The square root of 144421775 is about 12017.5611086443. The cubic root of 144421775 is about 524.6595222463.

The spelling of 144421775 in words is "one hundred forty-four million, four hundred twenty-one thousand, seven hundred seventy-five".