42134521 has 8 divisors (see below), whose sum is σ = 49500864. Its totient is φ = 35357520.

The previous prime is 42134509. The next prime is 42134563. The reversal of 42134521 is 12543124.

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

It is a de Polignac number, because none of the positive numbers 2^k-42134521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42134492 and 42134501.

It is not an unprimeable number, because it can be changed into a prime (42134021) 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, 147181 + ... + 147466.

It is an arithmetic number, because the mean of its divisors is an integer number (6187608).

Almost surely, 2^42134521 is an apocalyptic number.

It is an amenable number.

42134521 is a deficient number, since it is larger than the sum of its proper divisors (7366343).

42134521 is a wasteful number, since it uses less digits than its factorization.

42134521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294671.

The product of its digits is 960, while the sum is 22.

The square root of 42134521 is about 6491.1109218685. The cubic root of 42134521 is about 347.9733789695.

Adding to 42134521 its reverse (12543124), we get a palindrome (54677645).

It can be divided in two parts, 4 and 2134521, that multiplied together give a square (8538084 = 2922²).

The spelling of 42134521 in words is "forty-two million, one hundred thirty-four thousand, five hundred twenty-one".