42345512421 has 4 divisors (see below), whose sum is σ = 56460683232. Its totient is φ = 28230341612.

The previous prime is 42345512411. The next prime is 42345512423. The reversal of 42345512421 is 12421554324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42345512421 - 2⁵ = 42345512389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42345512423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7057585401 + ... + 7057585406.

It is an arithmetic number, because the mean of its divisors is an integer number (14115170808).

Almost surely, 2^42345512421 is an apocalyptic number.

It is an amenable number.

42345512421 is a deficient number, since it is larger than the sum of its proper divisors (14115170811).

42345512421 is a wasteful number, since it uses less digits than its factorization.

42345512421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14115170810.

The product of its digits is 38400, while the sum is 33.

The spelling of 42345512421 in words is "forty-two billion, three hundred forty-five million, five hundred twelve thousand, four hundred twenty-one".