42121015 has 8 divisors (see below), whose sum is σ = 50743440. Its totient is φ = 33564672.

The previous prime is 42121007. The next prime is 42121067. The reversal of 42121015 is 51012124.

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 42121015 - 2³ = 42121007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42121015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15105 + ... + 17674.

It is an arithmetic number, because the mean of its divisors is an integer number (6342930).

Almost surely, 2^42121015 is an apocalyptic number.

42121015 is a deficient number, since it is larger than the sum of its proper divisors (8622425).

42121015 is a wasteful number, since it uses less digits than its factorization.

42121015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33041.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 42121015 is about 6490.0704926834. The cubic root of 42121015 is about 347.9361946481.

Adding to 42121015 its reverse (51012124), we get a palindrome (93133139).

The spelling of 42121015 in words is "forty-two million, one hundred twenty-one thousand, fifteen".