42955421 has 8 divisors (see below), whose sum is σ = 44890944. Its totient is φ = 41025600.

The previous prime is 42955403. The next prime is 42955441. The reversal of 42955421 is 12455924.

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

It is a cyclic number.

It is not a de Polignac number, because 42955421 - 2¹⁰ = 42954397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42955441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23285 + ... + 25061.

It is an arithmetic number, because the mean of its divisors is an integer number (5611368).

Almost surely, 2^42955421 is an apocalyptic number.

It is an amenable number.

42955421 is a deficient number, since it is larger than the sum of its proper divisors (1935523).

42955421 is a wasteful number, since it uses less digits than its factorization.

42955421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851.

The product of its digits is 14400, while the sum is 32.

The square root of 42955421 is about 6554.0385259777. The cubic root of 42955421 is about 350.2186959734.

The spelling of 42955421 in words is "forty-two million, nine hundred fifty-five thousand, four hundred twenty-one".