42121051 has 8 divisors (see below), whose sum is σ = 48215264. Its totient is φ = 36046080.

The previous prime is 42121007. The next prime is 42121067. The reversal of 42121051 is 15012124.

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

It is not a de Polignac number, because 42121051 - 2¹⁵ = 42088283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42121151) 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, 241 + ... + 9181.

It is an arithmetic number, because the mean of its divisors is an integer number (6026908).

Almost surely, 2^42121051 is an apocalyptic number.

42121051 is a deficient number, since it is larger than the sum of its proper divisors (6094213).

42121051 is an equidigital number, since it uses as much as digits as its factorization.

42121051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9621.

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

The square root of 42121051 is about 6490.0732661504. The cubic root of 42121051 is about 347.9362937729.

Adding to 42121051 its reverse (15012124), we get a palindrome (57133175).

The spelling of 42121051 in words is "forty-two million, one hundred twenty-one thousand, fifty-one".