1131457 has 4 divisors (see below), whose sum is σ = 1144260. Its totient is φ = 1118656.

The previous prime is 1131451. The next prime is 1131463. The reversal of 1131457 is 7541311.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1131451) and next prime (1131463).

It can be written as a sum of positive squares in 2 ways, for example, as 690561 + 440896 = 831^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131457 - 2⁷ = 1131329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131451) 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, 6268 + ... + 6445.

It is an arithmetic number, because the mean of its divisors is an integer number (286065).

2^1131457 is an apocalyptic number.

It is an amenable number.

1131457 is a deficient number, since it is larger than the sum of its proper divisors (12803).

1131457 is an equidigital number, since it uses as much as digits as its factorization.

1131457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12802.

The product of its digits is 420, while the sum is 22.

The square root of 1131457 is about 1063.6996756604. The cubic root of 1131457 is about 104.2027909553.

Adding to 1131457 its reverse (7541311), we get a palindrome (8672768).

The spelling of 1131457 in words is "one million, one hundred thirty-one thousand, four hundred fifty-seven".