144767021 has 6 divisors (see below), whose sum is σ = 168402510. Its totient is φ = 124085976.

The previous prime is 144767017. The next prime is 144767027. The reversal of 144767021 is 120767441.

It can be written as a sum of positive squares in only one way, i.e., 103022500 + 41744521 = 10150^2 + 6461^2 .

It is not a de Polignac number, because 144767021 - 2² = 144767017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144767027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1477166 + ... + 1477263.

It is an arithmetic number, because the mean of its divisors is an integer number (28067085).

Almost surely, 2^144767021 is an apocalyptic number.

It is an amenable number.

144767021 is a deficient number, since it is larger than the sum of its proper divisors (23635489).

144767021 is an equidigital number, since it uses as much as digits as its factorization.

144767021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954443 (or 2954436 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 144767021 is about 12031.9167633424. The cubic root of 144767021 is about 525.0772627030.

The spelling of 144767021 in words is "one hundred forty-four million, seven hundred sixty-seven thousand, twenty-one".