1320860 has 24 divisors (see below), whose sum is σ = 2795856. Its totient is φ = 524160.

The previous prime is 1320859. The next prime is 1320871. The reversal of 1320860 is 680231.

It is a super-2 number, since 2×1320860² = 3489342279200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4064 + ... + 4376.

It is an arithmetic number, because the mean of its divisors is an integer number (116494).

2^1320860 is an apocalyptic number.

1320860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320860 is an abundant number, since it is smaller than the sum of its proper divisors (1474996).

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

1320860 is a wasteful number, since it uses less digits than its factorization.

1320860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1320860 is about 1149.2867353276. The cubic root of 1320860 is about 109.7199487740.

The spelling of 1320860 in words is "one million, three hundred twenty thousand, eight hundred sixty".