1312521 has 8 divisors (see below), whose sum is σ = 2000064. Its totient is φ = 750000.

The previous prime is 1312517. The next prime is 1312523. The reversal of 1312521 is 1252131.

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

It is not a de Polignac number, because 1312521 - 2² = 1312517 is a prime.

It is a super-2 number, since 2×1312521² = 3445422750882, which contains 22 as substring.

1312521 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312521.

It is not an unprimeable number, because it can be changed into a prime (1312523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31230 + ... + 31271.

It is an arithmetic number, because the mean of its divisors is an integer number (250008).

2^1312521 is an apocalyptic number.

It is an amenable number.

1312521 is a deficient number, since it is larger than the sum of its proper divisors (687543).

1312521 is an equidigital number, since it uses as much as digits as its factorization.

1312521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62511.

The product of its digits is 60, while the sum is 15.

The square root of 1312521 is about 1145.6530888537. The cubic root of 1312521 is about 109.4885624300.

Adding to 1312521 its reverse (1252131), we get a palindrome (2564652).

It can be divided in two parts, 13125 and 21, that multiplied together give a square (275625 = 525²).

The spelling of 1312521 in words is "one million, three hundred twelve thousand, five hundred twenty-one".