42380421 has 16 divisors (see below), whose sum is σ = 59936640. Its totient is φ = 26579520.

The previous prime is 42380411. The next prime is 42380447. The reversal of 42380421 is 12408324.

It is not a de Polignac number, because 42380421 - 2¹¹ = 42378373 is a prime.

It is a super-2 number, since 2×42380421² = 3592200168274482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42380391 and 42380400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42380411) 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, 826 + ... + 9243.

It is an arithmetic number, because the mean of its divisors is an integer number (3746040).

Almost surely, 2^42380421 is an apocalyptic number.

It is an amenable number.

42380421 is a deficient number, since it is larger than the sum of its proper divisors (17556219).

42380421 is a wasteful number, since it uses less digits than its factorization.

42380421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10156.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 42380421 is about 6510.0246543312. The cubic root of 42380421 is about 348.6489986420.

Adding to 42380421 its reverse (12408324), we get a palindrome (54788745).

The spelling of 42380421 in words is "forty-two million, three hundred eighty thousand, four hundred twenty-one".