42380121 has 16 divisors (see below), whose sum is σ = 64773504. Its totient is φ = 24144384.

The previous prime is 42380119. The next prime is 42380123. The reversal of 42380121 is 12108324.

42380121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42380119) and next prime (42380123).

It is not a de Polignac number, because 42380121 - 2¹ = 42380119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (42380123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4555 + ... + 10271.

It is an arithmetic number, because the mean of its divisors is an integer number (4048344).

Almost surely, 2^42380121 is an apocalyptic number.

It is an amenable number.

42380121 is a deficient number, since it is larger than the sum of its proper divisors (22393383).

42380121 is a wasteful number, since it uses less digits than its factorization.

42380121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6080.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 42380121 is about 6510.0016129030. The cubic root of 42380121 is about 348.6481759748.

Subtracting from 42380121 its sum of digits (21), we obtain a square (42380100 = 6510²).

Adding to 42380121 its reverse (12108324), we get a palindrome (54488445).

The spelling of 42380121 in words is "forty-two million, three hundred eighty thousand, one hundred twenty-one".