42123012340 has 12 divisors (see below), whose sum is σ = 88458325956. Its totient is φ = 16849204928.

The previous prime is 42123012329. The next prime is 42123012409. The reversal of 42123012340 is 4321032124.

It can be written as a sum of positive squares in 2 ways, for example, as 4538986384 + 37584025956 = 67372^2 + 193866^2 .

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 3 ways as a sum of consecutive naturals, for example, 1053075289 + ... + 1053075328.

It is an arithmetic number, because the mean of its divisors is an integer number (7371527163).

Almost surely, 2^42123012340 is an apocalyptic number.

It is an amenable number.

42123012340 is an abundant number, since it is smaller than the sum of its proper divisors (46335313616).

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

42123012340 is a wasteful number, since it uses less digits than its factorization.

42123012340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106150626 (or 2106150624 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 42123012340 its reverse (4321032124), we get a palindrome (46444044464).

The spelling of 42123012340 in words is "forty-two billion, one hundred twenty-three million, twelve thousand, three hundred forty".