42567421 has 8 divisors (see below), whose sum is σ = 46011224. Its totient is φ = 39147840.

The previous prime is 42567409. The next prime is 42567449. The reversal of 42567421 is 12476524.

It can be written as a sum of positive squares in 4 ways, for example, as 1428025 + 41139396 = 1195^2 + 6414^2 .

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 42567421 - 2¹³ = 42559229 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 (42567401) 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, 2310 + ... + 9511.

It is an arithmetic number, because the mean of its divisors is an integer number (5751403).

Almost surely, 2^42567421 is an apocalyptic number.

It is an amenable number.

42567421 is a deficient number, since it is larger than the sum of its proper divisors (3443803).

42567421 is a wasteful number, since it uses less digits than its factorization.

42567421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12111.

The product of its digits is 13440, while the sum is 31.

The square root of 42567421 is about 6524.3713107088. The cubic root of 42567421 is about 349.1610409404.

The spelling of 42567421 in words is "forty-two million, five hundred sixty-seven thousand, four hundred twenty-one".