1311485 has 24 divisors (see below), whose sum is σ = 1883736. Its totient is φ = 873600.

The previous prime is 1311481. The next prime is 1311493. The reversal of 1311485 is 5841131.

It can be written as a sum of positive squares in 4 ways, for example, as 582169 + 729316 = 763^2 + 854^2 .

It is not a de Polignac number, because 1311485 - 2² = 1311481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12935 + ... + 13035.

It is an arithmetic number, because the mean of its divisors is an integer number (78489).

2^1311485 is an apocalyptic number.

It is an amenable number.

1311485 is a deficient number, since it is larger than the sum of its proper divisors (572251).

1311485 is a wasteful number, since it uses less digits than its factorization.

1311485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 166 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 1311485 is about 1145.2008557454. The cubic root of 1311485 is about 109.4597476509.

The spelling of 1311485 in words is "one million, three hundred eleven thousand, four hundred eighty-five".