1311951 has 8 divisors (see below), whose sum is σ = 1805824. Its totient is φ = 846360.

The previous prime is 1311923. The next prime is 1311967. The reversal of 1311951 is 1591131.

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

It is not a de Polignac number, because 1311951 - 2¹⁰ = 1310927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311901) 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, 6961 + ... + 7146.

It is an arithmetic number, because the mean of its divisors is an integer number (225728).

2^1311951 is an apocalyptic number.

1311951 is a deficient number, since it is larger than the sum of its proper divisors (493873).

1311951 is a wasteful number, since it uses less digits than its factorization.

1311951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14141.

The product of its digits is 135, while the sum is 21.

The square root of 1311951 is about 1145.4042954346. The cubic root of 1311951 is about 109.4727106158.

The spelling of 1311951 in words is "one million, three hundred eleven thousand, nine hundred fifty-one".