42001292605 has 4 divisors (see below), whose sum is σ = 50401551132. Its totient is φ = 33601034080.

The previous prime is 42001292603. The next prime is 42001292633. The reversal of 42001292605 is 50629210024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16695482521 + 25305810084 = 129211^2 + 159078^2 .

It is not a de Polignac number, because 42001292605 - 2¹ = 42001292603 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 (42001292603) 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, 4200129256 + ... + 4200129265.

It is an arithmetic number, because the mean of its divisors is an integer number (12600387783).

Almost surely, 2^42001292605 is an apocalyptic number.

It is an amenable number.

42001292605 is a deficient number, since it is larger than the sum of its proper divisors (8400258527).

42001292605 is an equidigital number, since it uses as much as digits as its factorization.

42001292605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400258526.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 42001292605 in words is "forty-two billion, one million, two hundred ninety-two thousand, six hundred five".