1340992 has 28 divisors (see below), whose sum is σ = 2779776. Its totient is φ = 640640.

The previous prime is 1340981. The next prime is 1341007. The reversal of 1340992 is 2990431.

It is a happy number.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1340992.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1017 + ... + 1927.

2^1340992 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 1340992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1389888).

1340992 is an abundant number, since it is smaller than the sum of its proper divisors (1438784).

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

1340992 is an equidigital number, since it uses as much as digits as its factorization.

1340992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1340992 is about 1158.0120897469. The cubic root of 1340992 is about 110.2745757573.

Subtracting from 1340992 its sum of digits (28), we obtain a square (1340964 = 1158²).

It can be divided in two parts, 1340 and 992, that added together give a palindrome (2332).

The spelling of 1340992 in words is "one million, three hundred forty thousand, nine hundred ninety-two".