144261021 has 8 divisors (see below), whose sum is σ = 193622464. Its totient is φ = 95536800.

The previous prime is 144261017. The next prime is 144261043. The reversal of 144261021 is 120162441.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144261021 - 2² = 144261017 is a prime.

It is a super-2 number, since 2×144261021² = 41622484359924882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144261121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158776 + ... + 159681.

It is an arithmetic number, because the mean of its divisors is an integer number (24202808).

Almost surely, 2^144261021 is an apocalyptic number.

It is an amenable number.

144261021 is a deficient number, since it is larger than the sum of its proper divisors (49361443).

144261021 is a wasteful number, since it uses less digits than its factorization.

144261021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318611.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 144261021 is about 12010.8709509344. The cubic root of 144261021 is about 524.4647860781.

The spelling of 144261021 in words is "one hundred forty-four million, two hundred sixty-one thousand, twenty-one".