144740421 has 48 divisors (see below), whose sum is σ = 248976000. Its totient is φ = 79277184.

The previous prime is 144740413. The next prime is 144740443. The reversal of 144740421 is 124047441.

It is not a de Polignac number, because 144740421 - 2³ = 144740413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144740471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 414555 + ... + 414903.

It is an arithmetic number, because the mean of its divisors is an integer number (5187000).

Almost surely, 2^144740421 is an apocalyptic number.

It is an amenable number.

144740421 is a deficient number, since it is larger than the sum of its proper divisors (104235579).

144740421 is a wasteful number, since it uses less digits than its factorization.

144740421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 144740421 is about 12030.8113192752. The cubic root of 144740421 is about 525.0451008873.

Adding to 144740421 its reverse (124047441), we get a palindrome (268787862).

It can be divided in two parts, 144740 and 421, that added together give a square (145161 = 381²).

The spelling of 144740421 in words is "one hundred forty-four million, seven hundred forty thousand, four hundred twenty-one".