42121255398 has 16 divisors (see below), whose sum is σ = 84270977856. Its totient is φ = 14035673960.

The previous prime is 42121255373. The next prime is 42121255417. The reversal of 42121255398 is 89355212124.

It is a Curzon number.

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, 1166868 + ... + 1202423.

It is an arithmetic number, because the mean of its divisors is an integer number (5266936116).

Almost surely, 2^42121255398 is an apocalyptic number.

42121255398 is an abundant number, since it is smaller than the sum of its proper divisors (42149722458).

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

42121255398 is a wasteful number, since it uses less digits than its factorization.

42121255398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372259.

The product of its digits is 172800, while the sum is 42.

The spelling of 42121255398 in words is "forty-two billion, one hundred twenty-one million, two hundred fifty-five thousand, three hundred ninety-eight".