42034421 has 16 divisors (see below), whose sum is σ = 52291008. Its totient is φ = 33196800.

The previous prime is 42034417. The next prime is 42034423. The reversal of 42034421 is 12443024.

It is not a de Polignac number, because 42034421 - 2² = 42034417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42034393 and 42034402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42034423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6215 + ... + 11076.

It is an arithmetic number, because the mean of its divisors is an integer number (3268188).

Almost surely, 2^42034421 is an apocalyptic number.

It is an amenable number.

42034421 is a deficient number, since it is larger than the sum of its proper divisors (10256587).

42034421 is a wasteful number, since it uses less digits than its factorization.

42034421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17332.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42034421 is about 6483.3957923298. The cubic root of 42034421 is about 347.6975975380.

Adding to 42034421 its reverse (12443024), we get a palindrome (54477445).

The spelling of 42034421 in words is "forty-two million, thirty-four thousand, four hundred twenty-one".