42021113 has 4 divisors (see below), whose sum is σ = 42036480. Its totient is φ = 42005748.

The previous prime is 42021073. The next prime is 42021121. The reversal of 42021113 is 31112024.

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 42021113 - 2⁸ = 42020857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42021143) 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 3 ways as a sum of consecutive naturals, for example, 2345 + ... + 9462.

It is an arithmetic number, because the mean of its divisors is an integer number (10509120).

Almost surely, 2^42021113 is an apocalyptic number.

It is an amenable number.

42021113 is a deficient number, since it is larger than the sum of its proper divisors (15367).

42021113 is a wasteful number, since it uses less digits than its factorization.

42021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15366.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 42021113 is about 6482.3693970646. The cubic root of 42021113 is about 347.6609002479.

Adding to 42021113 its reverse (31112024), we get a palindrome (73133137).

The spelling of 42021113 in words is "forty-two million, twenty-one thousand, one hundred thirteen".