1145657 has 4 divisors (see below), whose sum is σ = 1148916. Its totient is φ = 1142400.

The previous prime is 1145623. The next prime is 1145659. The reversal of 1145657 is 7565411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7565411 = 7 ⋅1080773.

It can be written as a sum of positive squares in 2 ways, for example, as 1008016 + 137641 = 1004^2 + 371^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145657 - 2⁶ = 1145593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145659) 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, 1028 + ... + 1829.

It is an arithmetic number, because the mean of its divisors is an integer number (287229).

2^1145657 is an apocalyptic number.

It is an amenable number.

1145657 is a deficient number, since it is larger than the sum of its proper divisors (3259).

1145657 is an equidigital number, since it uses as much as digits as its factorization.

1145657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258.

The product of its digits is 4200, while the sum is 29.

The square root of 1145657 is about 1070.3536798647. The cubic root of 1145657 is about 104.6369015303.

The spelling of 1145657 in words is "one million, one hundred forty-five thousand, six hundred fifty-seven".