42001534123425 has 72 divisors (see below), whose sum is σ = 75299099406336. Its totient is φ = 22380077953920.

The previous prime is 42001534123411. The next prime is 42001534123529. The reversal of 42001534123425 is 52432143510024.

It is a happy number.

42001534123425 is a `hidden beast` number, since 4 + 20 + 0 + 153 + 41 + 23 + 425 = 666.

It is not a de Polignac number, because 42001534123425 - 2⁶ = 42001534123361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42001534123425.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1188918112 + ... + 1188953438.

It is an arithmetic number, because the mean of its divisors is an integer number (1045820825088).

Almost surely, 2^{42001534123425} is an apocalyptic number.

42001534123425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42001534123425 is a deficient number, since it is larger than the sum of its proper divisors (33297565282911).

42001534123425 is a wasteful number, since it uses less digits than its factorization.

42001534123425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40087 (or 40079 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 42001534123425 its reverse (52432143510024), we get a palindrome (94433677633449).

The spelling of 42001534123425 in words is "forty-two trillion, one billion, five hundred thirty-four million, one hundred twenty-three thousand, four hundred twenty-five".