1145671 has 4 divisors (see below), whose sum is σ = 1150200. Its totient is φ = 1141144.

The previous prime is 1145659. The next prime is 1145689. The reversal of 1145671 is 1765411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1765411 = 23 ⋅76757.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145671 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 (1145611) 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, 1861 + ... + 2398.

It is an arithmetic number, because the mean of its divisors is an integer number (287550).

2^1145671 is an apocalyptic number.

1145671 is a deficient number, since it is larger than the sum of its proper divisors (4529).

1145671 is an equidigital number, since it uses as much as digits as its factorization.

1145671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528.

The product of its digits is 840, while the sum is 25.

The square root of 1145671 is about 1070.3602197391. The cubic root of 1145671 is about 104.6373277517.

The spelling of 1145671 in words is "one million, one hundred forty-five thousand, six hundred seventy-one".