144964421 has 4 divisors (see below), whose sum is σ = 165673632. Its totient is φ = 124255212.

The previous prime is 144964411. The next prime is 144964427. The reversal of 144964421 is 124469441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124469441 = 4007 ⋅31063.

It is a cyclic number.

It is not a de Polignac number, because 144964421 - 2¹⁰ = 144963397 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 (144964427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10354595 + ... + 10354608.

It is an arithmetic number, because the mean of its divisors is an integer number (41418408).

Almost surely, 2^144964421 is an apocalyptic number.

It is an amenable number.

144964421 is a deficient number, since it is larger than the sum of its proper divisors (20709211).

144964421 is an equidigital number, since it uses as much as digits as its factorization.

144964421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20709210.

The product of its digits is 27648, while the sum is 35.

The square root of 144964421 is about 12040.1171505928. The cubic root of 144964421 is about 525.3158142164.

The spelling of 144964421 in words is "one hundred forty-four million, nine hundred sixty-four thousand, four hundred twenty-one".