1312641 has 12 divisors (see below), whose sum is σ = 2068560. Its totient is φ = 795480.

The previous prime is 1312637. The next prime is 1312657. The reversal of 1312641 is 1462131.

It is a happy number.

1312641 is a `hidden beast` number, since 13 + 12 + 641 = 666.

It is not a de Polignac number, because 1312641 - 2² = 1312637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312601) 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 11 ways as a sum of consecutive naturals, for example, 6531 + ... + 6728.

It is an arithmetic number, because the mean of its divisors is an integer number (172380).

2^1312641 is an apocalyptic number.

1312641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1312641 is a deficient number, since it is larger than the sum of its proper divisors (755919).

1312641 is a wasteful number, since it uses less digits than its factorization.

1312641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13276 (or 13273 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1312641 is about 1145.7054595314. The cubic root of 1312641 is about 109.4918990692.

Adding to 1312641 its reverse (1462131), we get a palindrome (2774772).

It can be divided in two parts, 1312 and 641, that added together give a triangular number (1953 = T₆₂).

The spelling of 1312641 in words is "one million, three hundred twelve thousand, six hundred forty-one".