42154321 has 16 divisors (see below), whose sum is σ = 47001600. Its totient is φ = 37486800.

The previous prime is 42154303. The next prime is 42154337. The reversal of 42154321 is 12345124.

It is a cyclic number.

It is not a de Polignac number, because 42154321 - 2¹¹ = 42152273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42154292 and 42154301.

It is not an unprimeable number, because it can be changed into a prime (42154351) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 155416 + ... + 155686.

It is an arithmetic number, because the mean of its divisors is an integer number (2937600).

Almost surely, 2^42154321 is an apocalyptic number.

It is an amenable number.

42154321 is a deficient number, since it is larger than the sum of its proper divisors (4847279).

42154321 is a wasteful number, since it uses less digits than its factorization.

42154321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

The product of its digits is 960, while the sum is 22.

The square root of 42154321 is about 6492.6359053931. The cubic root of 42154321 is about 348.0278773854.

Adding to 42154321 its reverse (12345124), we get a palindrome (54499445).

The spelling of 42154321 in words is "forty-two million, one hundred fifty-four thousand, three hundred twenty-one".