42312421 has 8 divisors (see below), whose sum is σ = 44006400. Its totient is φ = 40634160.

The previous prime is 42312419. The next prime is 42312437. The reversal of 42312421 is 12421324.

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

It is a cyclic number.

It is not a de Polignac number, because 42312421 - 2¹ = 42312419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42312481) 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, 1720 + ... + 9358.

It is an arithmetic number, because the mean of its divisors is an integer number (5500800).

Almost surely, 2^42312421 is an apocalyptic number.

It is an amenable number.

42312421 is a deficient number, since it is larger than the sum of its proper divisors (1693979).

42312421 is a wasteful number, since it uses less digits than its factorization.

42312421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7859.

The product of its digits is 384, while the sum is 19.

The square root of 42312421 is about 6504.7998431927. The cubic root of 42312421 is about 348.4624280301.

Adding to 42312421 its reverse (12421324), we get a palindrome (54733745).

The spelling of 42312421 in words is "forty-two million, three hundred twelve thousand, four hundred twenty-one".