420340156321 has 8 divisors (see below), whose sum is σ = 434875057920. Its totient is φ = 405807949008.

The previous prime is 420340156289. The next prime is 420340156343. The reversal of 420340156321 is 123651043024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420340156321 - 2⁵ = 420340156289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420340156361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353571 + ... + 982696.

It is an arithmetic number, because the mean of its divisors is an integer number (54359382240).

Almost surely, 2^420340156321 is an apocalyptic number.

It is an amenable number.

420340156321 is a deficient number, since it is larger than the sum of its proper divisors (14534901599).

420340156321 is a wasteful number, since it uses less digits than its factorization.

420340156321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347143.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 420340156321 its reverse (123651043024), we get a palindrome (543991199345).

The spelling of 420340156321 in words is "four hundred twenty billion, three hundred forty million, one hundred fifty-six thousand, three hundred twenty-one".