781452 has 54 divisors (see below), whose sum is σ = 2303028. Its totient is φ = 222768.

The previous prime is 781433. The next prime is 781453. The reversal of 781452 is 254187.

It is a super-2 number, since 2×781452² = 1221334456608, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (781453) by changing a digit.

781452 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1543 + ... + 1985.

2⁷⁸¹⁴⁵² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1151514).

781452 is an abundant number, since it is smaller than the sum of its proper divisors (1521576).

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

781452 is a wasteful number, since it uses less digits than its factorization.

781452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 455 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 781452 is about 883.9977375537. The cubic root of 781452 is about 92.1087246418.

The spelling of 781452 in words is "seven hundred eighty-one thousand, four hundred fifty-two".