1320642 has 12 divisors (see below), whose sum is σ = 2861430. Its totient is φ = 440208.

The previous prime is 1320623. The next prime is 1320667. The reversal of 1320642 is 2460231.

It is a happy number.

1320642 is a `hidden beast` number, since 1 + 3 + 20 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1320201 + 441 = 1149^2 + 21^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 73369 = 1320642 / (1 + 3 + 2 + 0 + 6 + 4 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36667 + ... + 36702.

2^1320642 is an apocalyptic number.

1320642 is an abundant number, since it is smaller than the sum of its proper divisors (1540788).

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

1320642 is a wasteful number, since it uses less digits than its factorization.

1320642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73377 (or 73374 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1320642 is about 1149.1918899818. The cubic root of 1320642 is about 109.7139122360.

Adding to 1320642 its reverse (2460231), we get a palindrome (3780873).

The spelling of 1320642 in words is "one million, three hundred twenty thousand, six hundred forty-two".