42416421 has 8 divisors (see below), whose sum is σ = 57191040. Its totient is φ = 27959712.

The previous prime is 42416389. The next prime is 42416449. The reversal of 42416421 is 12461424.

It is a happy number.

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

It is not a de Polignac number, because 42416421 - 2⁵ = 42416389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42416391 and 42416400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42416461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79165 + ... + 79698.

It is an arithmetic number, because the mean of its divisors is an integer number (7148880).

Almost surely, 2^42416421 is an apocalyptic number.

It is an amenable number.

42416421 is a deficient number, since it is larger than the sum of its proper divisors (14774619).

42416421 is a wasteful number, since it uses less digits than its factorization.

42416421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158955.

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

The square root of 42416421 is about 6512.7890338932. The cubic root of 42416421 is about 348.7476905334.

Adding to 42416421 its reverse (12461424), we get a palindrome (54877845).

The spelling of 42416421 in words is "forty-two million, four hundred sixteen thousand, four hundred twenty-one".