1042991090172 has 72 divisors (see below), whose sum is σ = 2743757825536. Its totient is φ = 346435111728.

The previous prime is 1042991090149. The next prime is 1042991090231. The reversal of 1042991090172 is 2710901992401.

It is a happy number.

1042991090172 is a `hidden beast` number, since 104 + 299 + 1 + 0 + 90 + 172 = 666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1620748 + ... + 2170899.

Almost surely, 2^{1042991090172} is an apocalyptic number.

1042991090172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1042991090172 is an abundant number, since it is smaller than the sum of its proper divisors (1700766735364).

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

1042991090172 is a wasteful number, since it uses less digits than its factorization.

1042991090172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791949 (or 3791935 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The spelling of 1042991090172 in words is "one trillion, forty-two billion, nine hundred ninety-one million, ninety thousand, one hundred seventy-two".