1297320 has 64 divisors (see below), whose sum is σ = 4104000. Its totient is φ = 327168.

The previous prime is 1297313. The next prime is 1297333. The reversal of 1297320 is 237921.

1297320 = T₃₆₀ + T₃₆₁ + ... + T₃₇₈.

It is a Cunningham number, because it is equal to 1139²-1.

It is a super-3 number, since 3×1297320³ = 6550321176333504000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable 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 15 ways as a sum of consecutive naturals, for example, 1996 + ... + 2564.

It is an arithmetic number, because the mean of its divisors is an integer number (64125).

2^1297320 is an apocalyptic number.

1297320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2052000).

1297320 is an abundant number, since it is smaller than the sum of its proper divisors (2806680).

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

1297320 is a wasteful number, since it uses less digits than its factorization.

1297320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 1297320 is about 1138.9995610184. Note that the first 3 decimals coincide. The cubic root of 1297320 is about 109.0642384296.

The spelling of 1297320 in words is "one million, two hundred ninety-seven thousand, three hundred twenty".