42144549 has 4 divisors (see below), whose sum is σ = 56192736. Its totient is φ = 28096364.

The previous prime is 42144539. The next prime is 42144551. The reversal of 42144549 is 94544124.

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.

It is a cyclic number.

It is not a de Polignac number, because 42144549 - 2⁸ = 42144293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42144539) 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, 7024089 + ... + 7024094.

It is an arithmetic number, because the mean of its divisors is an integer number (14048184).

Almost surely, 2^42144549 is an apocalyptic number.

It is an amenable number.

42144549 is a deficient number, since it is larger than the sum of its proper divisors (14048187).

42144549 is a wasteful number, since it uses less digits than its factorization.

42144549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14048186.

The product of its digits is 23040, while the sum is 33.

The square root of 42144549 is about 6491.8833168812. The cubic root of 42144549 is about 348.0009826237. Note that the first 3 decimals are identical.

The spelling of 42144549 in words is "forty-two million, one hundred forty-four thousand, five hundred forty-nine".