1321015 has 8 divisors (see below), whose sum is σ = 1591488. Its totient is φ = 1052640.

The previous prime is 1321007. The next prime is 1321031. The reversal of 1321015 is 5101231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321015 - 2³ = 1321007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320986 and 1321004.

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, 1849 + ... + 2461.

It is an arithmetic number, because the mean of its divisors is an integer number (198936).

2^1321015 is an apocalyptic number.

1321015 is a deficient number, since it is larger than the sum of its proper divisors (270473).

1321015 is an equidigital number, since it uses as much as digits as its factorization.

1321015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1321015 is about 1149.3541664779. The cubic root of 1321015 is about 109.7242404039.

Adding to 1321015 its reverse (5101231), we get a palindrome (6422246).

It can be divided in two parts, 13210 and 15, that added together give a square (13225 = 115²).

The spelling of 1321015 in words is "one million, three hundred twenty-one thousand, fifteen".