144102421 has 16 divisors (see below), whose sum is σ = 158630400. Its totient is φ = 130294528.

The previous prime is 144102419. The next prime is 144102437. The reversal of 144102421 is 124201441.

It is not a de Polignac number, because 144102421 - 2¹ = 144102419 is a prime.

It is a super-2 number, since 2×144102421² = 41531015476122482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144102401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117216 + ... + 118438.

It is an arithmetic number, because the mean of its divisors is an integer number (9914400).

Almost surely, 2^144102421 is an apocalyptic number.

144102421 is the 6931-st octagonal number.

It is an amenable number.

144102421 is a deficient number, since it is larger than the sum of its proper divisors (14527979).

144102421 is a wasteful number, since it uses less digits than its factorization.

144102421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 144102421 is about 12004.2667831067. The cubic root of 144102421 is about 524.2725174257.

Adding to 144102421 its reverse (124201441), we get a palindrome (268303862).

The spelling of 144102421 in words is "one hundred forty-four million, one hundred two thousand, four hundred twenty-one".