144542421 has 8 divisors (see below), whose sum is σ = 214136960. Its totient is φ = 96361596.

The previous prime is 144542417. The next prime is 144542423. The reversal of 144542421 is 124245441.

144542421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 144542421 - 2² = 144542417 is a prime.

It is a super-2 number, since 2×144542421² = 41785022937082482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5353423 = 144542421 / (1 + 4 + 4 + 5 + 4 + 2 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144542423) 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, 2676685 + ... + 2676738.

It is an arithmetic number, because the mean of its divisors is an integer number (26767120).

Almost surely, 2^144542421 is an apocalyptic number.

It is an amenable number.

144542421 is a deficient number, since it is larger than the sum of its proper divisors (69594539).

144542421 is an equidigital number, since it uses as much as digits as its factorization.

144542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353432 (or 5353426 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 144542421 is about 12022.5796316764. The cubic root of 144542421 is about 524.8055769879.

Adding to 144542421 its reverse (124245441), we get a palindrome (268787862).

The spelling of 144542421 in words is "one hundred forty-four million, five hundred forty-two thousand, four hundred twenty-one".