42455121 has 8 divisors (see below), whose sum is σ = 57382560. Its totient is φ = 27915552.

The previous prime is 42455113. The next prime is 42455123. The reversal of 42455121 is 12155424.

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

It is not a de Polignac number, because 42455121 - 2³ = 42455113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42455091 and 42455100.

It is not an unprimeable number, because it can be changed into a prime (42455123) 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 7 ways as a sum of consecutive naturals, for example, 96711 + ... + 97148.

It is an arithmetic number, because the mean of its divisors is an integer number (7172820).

Almost surely, 2^42455121 is an apocalyptic number.

It is an amenable number.

42455121 is a deficient number, since it is larger than the sum of its proper divisors (14927439).

42455121 is a wasteful number, since it uses less digits than its factorization.

42455121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193935.

The product of its digits is 1600, while the sum is 24.

The square root of 42455121 is about 6515.7594338649. The cubic root of 42455121 is about 348.8537220554.

The spelling of 42455121 in words is "forty-two million, four hundred fifty-five thousand, one hundred twenty-one".