42060256421 has 4 divisors (see below), whose sum is σ = 42064405152. Its totient is φ = 42056107692.

The previous prime is 42060256417. The next prime is 42060256453. The reversal of 42060256421 is 12465206024.

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 42060256421 - 2² = 42060256417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42060256921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059121 + ... + 2079446.

It is an arithmetic number, because the mean of its divisors is an integer number (10516101288).

Almost surely, 2^42060256421 is an apocalyptic number.

It is an amenable number.

42060256421 is a deficient number, since it is larger than the sum of its proper divisors (4148731).

42060256421 is a wasteful number, since it uses less digits than its factorization.

42060256421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148730.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 42060256421 in words is "forty-two billion, sixty million, two hundred fifty-six thousand, four hundred twenty-one".