424042421 has 16 divisors (see below), whose sum is σ = 483781248. Its totient is φ = 367910400.

The previous prime is 424042357. The next prime is 424042433. The reversal of 424042421 is 124240424.

It is not a de Polignac number, because 424042421 - 2⁶ = 424042357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424042471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130205 + ... + 133421.

It is an arithmetic number, because the mean of its divisors is an integer number (30236328).

Almost surely, 2^424042421 is an apocalyptic number.

It is an amenable number.

424042421 is a deficient number, since it is larger than the sum of its proper divisors (59738827).

424042421 is a wasteful number, since it uses less digits than its factorization.

424042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 424042421 is about 20592.2903291499. The cubic root of 424042421 is about 751.2822043166.

Adding to 424042421 its reverse (124240424), we get a palindrome (548282845).

The spelling of 424042421 in words is "four hundred twenty-four million, forty-two thousand, four hundred twenty-one".