1000401522406 has 32 divisors (see below), whose sum is σ = 1763156102400. Its totient is φ = 419698709280.

The previous prime is 1000401522403. The next prime is 1000401522427. The reversal of 1000401522406 is 6042251040001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000401522403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2237335 + ... + 2646973.

It is an arithmetic number, because the mean of its divisors is an integer number (55098628200).

Almost surely, 2^{1000401522406} is an apocalyptic number.

1000401522406 is a deficient number, since it is larger than the sum of its proper divisors (762754579994).

1000401522406 is a wasteful number, since it uses less digits than its factorization.

1000401522406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418204.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 1000401522406 its reverse (6042251040001), we get a palindrome (7042652562407).

The spelling of 1000401522406 in words is "one trillion, four hundred one million, five hundred twenty-two thousand, four hundred six".