42129105774 has 32 divisors (see below), whose sum is σ = 97614216960. Its totient is φ = 11871997632.

The previous prime is 42129105769. The next prime is 42129105779. The reversal of 42129105774 is 47750192124.

It is an interprime number because it is at equal distance from previous prime (42129105769) and next prime (42129105779).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42129105779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6867304 + ... + 6873435.

It is an arithmetic number, because the mean of its divisors is an integer number (3050444280).

Almost surely, 2^42129105774 is an apocalyptic number.

42129105774 is an abundant number, since it is smaller than the sum of its proper divisors (55485111186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42129105774 is a wasteful number, since it uses less digits than its factorization.

42129105774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13740824.

The product of its (nonzero) digits is 141120, while the sum is 42.

Adding to 42129105774 its reverse (47750192124), we get a palindrome (89879297898).

The spelling of 42129105774 in words is "forty-two billion, one hundred twenty-nine million, one hundred five thousand, seven hundred seventy-four".