42401261329 has 4 divisors (see below), whose sum is σ = 48458584384. Its totient is φ = 36343938276.

The previous prime is 42401261321. The next prime is 42401261339. The reversal of 42401261329 is 92316210424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42401261329 - 2³ = 42401261321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42401261294 and 42401261303.

It is not an unprimeable number, because it can be changed into a prime (42401261321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3028661517 + ... + 3028661530.

It is an arithmetic number, because the mean of its divisors is an integer number (12114646096).

Almost surely, 2^42401261329 is an apocalyptic number.

It is an amenable number.

42401261329 is a deficient number, since it is larger than the sum of its proper divisors (6057323055).

42401261329 is an equidigital number, since it uses as much as digits as its factorization.

42401261329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6057323054.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 42401261329 in words is "forty-two billion, four hundred one million, two hundred sixty-one thousand, three hundred twenty-nine".