1370643 has 4 divisors (see below), whose sum is σ = 1827528. Its totient is φ = 913760.

The previous prime is 1370623. The next prime is 1370657. The reversal of 1370643 is 3460731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3460731 = 3 ⋅1153577.

It is a cyclic number.

It is not a de Polignac number, because 1370643 - 2¹⁰ = 1369619 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1370623) 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, 228438 + ... + 228443.

It is an arithmetic number, because the mean of its divisors is an integer number (456882).

2^1370643 is an apocalyptic number.

1370643 is a deficient number, since it is larger than the sum of its proper divisors (456885).

1370643 is an equidigital number, since it uses as much as digits as its factorization.

1370643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456884.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 1370643 is about 1170.7446348372. The cubic root of 1370643 is about 111.0814271445.

The spelling of 1370643 in words is "one million, three hundred seventy thousand, six hundred forty-three".