42105251405 has 16 divisors (see below), whose sum is σ = 58922803200. Its totient is φ = 28872171216.

The previous prime is 42105251389. The next prime is 42105251413. The reversal of 42105251405 is 50415250124.

It is not a de Polignac number, because 42105251405 - 2⁴ = 42105251389 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12273869 + ... + 12277298.

It is an arithmetic number, because the mean of its divisors is an integer number (3682675200).

Almost surely, 2^42105251405 is an apocalyptic number.

It is an amenable number.

42105251405 is a deficient number, since it is larger than the sum of its proper divisors (16817551795).

42105251405 is an equidigital number, since it uses as much as digits as its factorization.

42105251405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24551193 (or 24551179 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 42105251405 in words is "forty-two billion, one hundred five million, two hundred fifty-one thousand, four hundred five".