1042969945081 has 3 divisors (see below), whose sum is σ = 1042970966341. Its totient is φ = 1042968923822.

The previous prime is 1042969945049. The next prime is 1042969945093. The reversal of 1042969945081 is 1805499692401.

The square root of 1042969945081 is 1021259.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1042969945081 - 2⁵ = 1042969945049 is a prime.

It is a super-2 number, since 2×1042969945081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042969945001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 510630 + ... + 1531888.

Almost surely, 2^{1042969945081} is an apocalyptic number.

1042969945081 is the 1021259-th square number.

1042969945081 is the 510630-th centered octagonal number.

It is an amenable number.

1042969945081 is a deficient number, since it is larger than the sum of its proper divisors (1021260).

1042969945081 is an frugal number, since it uses more digits than its factorization.

1042969945081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042518 (or 1021259 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 1042969945081 in words is "one trillion, forty-two billion, nine hundred sixty-nine million, nine hundred forty-five thousand, eighty-one".