1267813 has 8 divisors (see below), whose sum is σ = 1360800. Its totient is φ = 1177488.

The previous prime is 1267789. The next prime is 1267823. The reversal of 1267813 is 3187621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1267813 - 2¹⁷ = 1136741 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 (1267823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (170100).

2^1267813 is an apocalyptic number.

It is an amenable number.

1267813 is a deficient number, since it is larger than the sum of its proper divisors (92987).

1267813 is a wasteful number, since it uses less digits than its factorization.

1267813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its digits is 2016, while the sum is 28.

The square root of 1267813 is about 1125.9720245193. The cubic root of 1267813 is about 108.2310155572.

It can be divided in two parts, 1267 and 813, that added together give a triangular number (2080 = T₆₄).

The spelling of 1267813 in words is "one million, two hundred sixty-seven thousand, eight hundred thirteen".