1781080252 has 12 divisors (see below), whose sum is σ = 3562160560. Its totient is φ = 763320096.

The previous prime is 1781080243. The next prime is 1781080283. The reversal of 1781080252 is 2520801871.

1781080252 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31804977 + ... + 31805032.

Almost surely, 2^1781080252 is an apocalyptic number.

It is an amenable number.

1781080252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1781080252 is a wasteful number, since it uses less digits than its factorization.

1781080252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63610020 (or 63610018 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 1781080252 is about 42202.8464916764. The cubic root of 1781080252 is about 1212.1633887857.

The spelling of 1781080252 in words is "one billion, seven hundred eighty-one million, eighty thousand, two hundred fifty-two".