1316381 has 4 divisors (see below), whose sum is σ = 1436064. Its totient is φ = 1196700.

The previous prime is 1316363. The next prime is 1316389. The reversal of 1316381 is 1836131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1316381 is a prime.

It is a super-2 number, since 2×1316381² = 3465717874322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59825 + ... + 59846.

It is an arithmetic number, because the mean of its divisors is an integer number (359016).

2^1316381 is an apocalyptic number.

1316381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1316381 is a deficient number, since it is larger than the sum of its proper divisors (119683).

1316381 is a wasteful number, since it uses less digits than its factorization.

1316381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119682.

The product of its digits is 432, while the sum is 23.

The square root of 1316381 is about 1147.3364807239. The cubic root of 1316381 is about 109.5957892161.

The spelling of 1316381 in words is "one million, three hundred sixteen thousand, three hundred eighty-one".