1311958 has 16 divisors (see below), whose sum is σ = 2130624. Its totient is φ = 603520.

The previous prime is 1311923. The next prime is 1311967. The reversal of 1311958 is 8591131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1188 + ... + 2008.

It is an arithmetic number, because the mean of its divisors is an integer number (133164).

2^1311958 is an apocalyptic number.

1311958 is a deficient number, since it is larger than the sum of its proper divisors (818666).

1311958 is a wasteful number, since it uses less digits than its factorization.

1311958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887.

The product of its digits is 1080, while the sum is 28.

The square root of 1311958 is about 1145.4073511201. The cubic root of 1311958 is about 109.4729053150.

The spelling of 1311958 in words is "one million, three hundred eleven thousand, nine hundred fifty-eight".