1137643 has 4 divisors (see below), whose sum is σ = 1225168. Its totient is φ = 1050120.

The previous prime is 1137629. The next prime is 1137659. The reversal of 1137643 is 3467311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3467311 = 1237 ⋅2803.

It is a cyclic number.

It is not a de Polignac number, because 1137643 - 2⁵ = 1137611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1137613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43743 + ... + 43768.

It is an arithmetic number, because the mean of its divisors is an integer number (306292).

2^1137643 is an apocalyptic number.

1137643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1137643 is a deficient number, since it is larger than the sum of its proper divisors (87525).

1137643 is an equidigital number, since it uses as much as digits as its factorization.

1137643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87524.

The product of its digits is 1512, while the sum is 25.

The square root of 1137643 is about 1066.6034877123. The cubic root of 1137643 is about 104.3923481031.

The spelling of 1137643 in words is "one million, one hundred thirty-seven thousand, six hundred forty-three".