1318457 has 4 divisors (see below), whose sum is σ = 1506816. Its totient is φ = 1130100.

The previous prime is 1318451. The next prime is 1318459. The reversal of 1318457 is 7548131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7548131 = 1033 ⋅7307.

It is a cyclic number.

It is not a de Polignac number, because 1318457 - 2⁴ = 1318441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318451) 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, 94169 + ... + 94182.

It is an arithmetic number, because the mean of its divisors is an integer number (376704).

2^1318457 is an apocalyptic number.

It is an amenable number.

1318457 is a deficient number, since it is larger than the sum of its proper divisors (188359).

1318457 is an equidigital number, since it uses as much as digits as its factorization.

1318457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188358.

The product of its digits is 3360, while the sum is 29.

The square root of 1318457 is about 1148.2408283979. The cubic root of 1318457 is about 109.6533716736.

The spelling of 1318457 in words is "one million, three hundred eighteen thousand, four hundred fifty-seven".