42333421 has 4 divisors (see below), whose sum is σ = 45589852. Its totient is φ = 39076992.

The previous prime is 42333413. The next prime is 42333427. The reversal of 42333421 is 12433324.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8820900 + 33512521 = 2970^2 + 5789^2 .

It is a cyclic number.

It is not a de Polignac number, because 42333421 - 2³ = 42333413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42333392 and 42333401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42333427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628196 + ... + 1628221.

It is an arithmetic number, because the mean of its divisors is an integer number (11397463).

Almost surely, 2^42333421 is an apocalyptic number.

It is an amenable number.

42333421 is a deficient number, since it is larger than the sum of its proper divisors (3256431).

42333421 is a wasteful number, since it uses less digits than its factorization.

42333421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256430.

The product of its digits is 1728, while the sum is 22.

The square root of 42333421 is about 6506.4138355933. The cubic root of 42333421 is about 348.5200667450.

Adding to 42333421 its reverse (12433324), we get a palindrome (54766745).

The spelling of 42333421 in words is "forty-two million, three hundred thirty-three thousand, four hundred twenty-one".