1270643 has 4 divisors (see below), whose sum is σ = 1386168. Its totient is φ = 1155120.

The previous prime is 1270639. The next prime is 1270649. The reversal of 1270643 is 3460721.

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

It is a cyclic number.

It is not a de Polignac number, because 1270643 - 2² = 1270639 is a prime.

It is a super-2 number, since 2×1270643² = 3229067266898, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 2⁵ + 7⁷ + 0 + 6⁵ + 4⁹ + 3¹¹ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1270649) 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, 57746 + ... + 57767.

It is an arithmetic number, because the mean of its divisors is an integer number (346542).

2^1270643 is an apocalyptic number.

1270643 is a deficient number, since it is larger than the sum of its proper divisors (115525).

1270643 is a wasteful number, since it uses less digits than its factorization.

1270643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115524.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 1270643 is about 1127.2280159755. The cubic root of 1270643 is about 108.3114864559.

The spelling of 1270643 in words is "one million, two hundred seventy thousand, six hundred forty-three".