42125123551 has 24 divisors (see below), whose sum is σ = 49810868160. Its totient is φ = 35514484992.

The previous prime is 42125123527. The next prime is 42125123567. The reversal of 42125123551 is 15532152124.

It is not a de Polignac number, because 42125123551 - 2⁷ = 42125123423 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 (42125123851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1296715 + ... + 1328803.

It is an arithmetic number, because the mean of its divisors is an integer number (2075452840).

Almost surely, 2^42125123551 is an apocalyptic number.

42125123551 is a deficient number, since it is larger than the sum of its proper divisors (7685744609).

42125123551 is a wasteful number, since it uses less digits than its factorization.

42125123551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32543 (or 32536 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

Adding to 42125123551 its reverse (15532152124), we get a palindrome (57657275675).

The spelling of 42125123551 in words is "forty-two billion, one hundred twenty-five million, one hundred twenty-three thousand, five hundred fifty-one".