1005402421026 has 12 divisors (see below), whose sum is σ = 2178371912262. Its totient is φ = 335134140336.

The previous prime is 1005402421019. The next prime is 1005402421039. The reversal of 1005402421026 is 6201242045001.

1005402421026 is a `hidden beast` number, since 10 + 0 + 540 + 2 + 4 + 2 + 102 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 644800970025 + 360601451001 = 802995^2 + 600501^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27927845011 + ... + 27927845046.

Almost surely, 2^{1005402421026} is an apocalyptic number.

1005402421026 is an abundant number, since it is smaller than the sum of its proper divisors (1172969491236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005402421026 is a wasteful number, since it uses less digits than its factorization.

1005402421026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55855690065 (or 55855690062 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 1005402421026 its reverse (6201242045001), we get a palindrome (7206644466027).

The spelling of 1005402421026 in words is "one trillion, five billion, four hundred two million, four hundred twenty-one thousand, twenty-six".