42144155 has 8 divisors (see below), whose sum is σ = 50775984. Its totient is φ = 33580000.

The previous prime is 42144143. The next prime is 42144161. The reversal of 42144155 is 55144124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42144155 - 2²² = 37949851 is a prime.

It is a super-2 number, since 2×42144155² = 3552259601328050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15536 + ... + 18045.

It is an arithmetic number, because the mean of its divisors is an integer number (6346998).

Almost surely, 2^42144155 is an apocalyptic number.

42144155 is a deficient number, since it is larger than the sum of its proper divisors (8631829).

42144155 is a wasteful number, since it uses less digits than its factorization.

42144155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33837.

The product of its digits is 3200, while the sum is 26.

The square root of 42144155 is about 6491.8529712248. The cubic root of 42144155 is about 347.9998981591. Note that the first 3 decimals are identical.

Adding to 42144155 its reverse (55144124), we get a palindrome (97288279).

The spelling of 42144155 in words is "forty-two million, one hundred forty-four thousand, one hundred fifty-five".