42121434 has 8 divisors (see below), whose sum is σ = 84242880. Its totient is φ = 14040476.

The previous prime is 42121399. The next prime is 42121459. The reversal of 42121434 is 43412124.

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

42121434 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 42121434.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3510114 + ... + 3510125.

It is an arithmetic number, because the mean of its divisors is an integer number (10530360).

Almost surely, 2^42121434 is an apocalyptic number.

42121434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42121434 is a wasteful number, since it uses less digits than its factorization.

42121434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020244.

The product of its digits is 768, while the sum is 21.

The square root of 42121434 is about 6490.1027726840. The cubic root of 42121434 is about 347.9373483461.

Adding to 42121434 its reverse (43412124), we get a palindrome (85533558).

The spelling of 42121434 in words is "forty-two million, one hundred twenty-one thousand, four hundred thirty-four".