1320615 has 12 divisors (see below), whose sum is σ = 2289144. Its totient is φ = 704304.

The previous prime is 1320607. The next prime is 1320617. The reversal of 1320615 is 5160231.

It is not a de Polignac number, because 1320615 - 2³ = 1320607 is a prime.

1320615 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14629 + ... + 14718.

It is an arithmetic number, because the mean of its divisors is an integer number (190762).

2^1320615 is an apocalyptic number.

1320615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1320615 is a deficient number, since it is larger than the sum of its proper divisors (968529).

1320615 is a wasteful number, since it uses less digits than its factorization.

1320615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29358 (or 29355 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1320615 is about 1149.1801425364. The cubic root of 1320615 is about 109.7131645451.

Adding to 1320615 its reverse (5160231), we get a palindrome (6480846).

The spelling of 1320615 in words is "one million, three hundred twenty thousand, six hundred fifteen".