1320057 has 20 divisors (see below), whose sum is σ = 2023120. Its totient is φ = 857304.

The previous prime is 1320037. The next prime is 1320061. The reversal of 1320057 is 7500231.

It is not a de Polignac number, because 1320057 - 2¹⁰ = 1319033 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320037) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3294 + ... + 3672.

It is an arithmetic number, because the mean of its divisors is an integer number (101156).

2^1320057 is an apocalyptic number.

It is an amenable number.

1320057 is a deficient number, since it is larger than the sum of its proper divisors (703063).

1320057 is an equidigital number, since it uses as much as digits as its factorization.

1320057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 1320057 is about 1148.9373351058. The cubic root of 1320057 is about 109.6977099854.

Adding to 1320057 its reverse (7500231), we get a palindrome (8820288).

The spelling of 1320057 in words is "one million, three hundred twenty thousand, fifty-seven".