42451301003123 has 4 divisors (see below), whose sum is σ = 42452946874728. Its totient is φ = 42449655131520.

The previous prime is 42451301003087. The next prime is 42451301003231. The reversal of 42451301003123 is 32130010315424.

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

It is a cyclic number.

It is not a de Polignac number, because 42451301003123 - 2³⁴ = 42434121133939 is a prime.

It is a super-4 number, since 4×42451301003123⁴ (a number of 56 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42451301003323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822897113 + ... + 822948698.

It is an arithmetic number, because the mean of its divisors is an integer number (10613236718682).

Almost surely, 2^{42451301003123} is an apocalyptic number.

42451301003123 is a deficient number, since it is larger than the sum of its proper divisors (1645871605).

42451301003123 is a wasteful number, since it uses less digits than its factorization.

42451301003123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645871604.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 42451301003123 its reverse (32130010315424), we get a palindrome (74581311318547).

The spelling of 42451301003123 in words is "forty-two trillion, four hundred fifty-one billion, three hundred one million, three thousand, one hundred twenty-three".