1313521 has 8 divisors (see below), whose sum is σ = 1466784. Its totient is φ = 1165920.

The previous prime is 1313467. The next prime is 1313567. The reversal of 1313521 is 1253131.

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

It is a cyclic number.

It is not a de Polignac number, because 1313521 - 2¹¹ = 1311473 is a prime.

1313521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1313495 and 1313504.

It is not an unprimeable number, because it can be changed into a prime (1313621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 916 + ... + 1861.

It is an arithmetic number, because the mean of its divisors is an integer number (183348).

2^1313521 is an apocalyptic number.

1313521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1313521 is a deficient number, since it is larger than the sum of its proper divisors (153263).

1313521 is a wasteful number, since it uses less digits than its factorization.

1313521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831.

The product of its digits is 90, while the sum is 16.

The square root of 1313521 is about 1146.0894380457. The cubic root of 1313521 is about 109.5163615453.

Adding to 1313521 its reverse (1253131), we get a palindrome (2566652).

The spelling of 1313521 in words is "one million, three hundred thirteen thousand, five hundred twenty-one".