42129254251 has 12 divisors (see below), whose sum is σ = 49057008960. Its totient is φ = 36074309040.

The previous prime is 42129254239. The next prime is 42129254281. The reversal of 42129254251 is 15245292124.

It is a de Polignac number, because none of the positive numbers 2^k-42129254251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42129254251.

It is not an unprimeable number, because it can be changed into a prime (42129254281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 385236 + ... + 482353.

It is an arithmetic number, because the mean of its divisors is an integer number (4088084080).

Almost surely, 2^42129254251 is an apocalyptic number.

42129254251 is a deficient number, since it is larger than the sum of its proper divisors (6927754709).

42129254251 is an equidigital number, since it uses as much as digits as its factorization.

42129254251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868594 (or 868587 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The spelling of 42129254251 in words is "forty-two billion, one hundred twenty-nine million, two hundred fifty-four thousand, two hundred fifty-one".