42534421 has 4 divisors (see below), whose sum is σ = 42626752. Its totient is φ = 42442092.

The previous prime is 42534419. The next prime is 42534451. The reversal of 42534421 is 12443524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42534421 - 2¹ = 42534419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42534451) 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, 45471 + ... + 46396.

It is an arithmetic number, because the mean of its divisors is an integer number (10656688).

Almost surely, 2^42534421 is an apocalyptic number.

It is an amenable number.

42534421 is a deficient number, since it is larger than the sum of its proper divisors (92331).

42534421 is an equidigital number, since it uses as much as digits as its factorization.

42534421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92330.

The product of its digits is 3840, while the sum is 25.

The square root of 42534421 is about 6521.8418410753. The cubic root of 42534421 is about 349.0707896567.

Adding to 42534421 its reverse (12443524), we get a palindrome (54977945).

The spelling of 42534421 in words is "forty-two million, five hundred thirty-four thousand, four hundred twenty-one".