1269312 has 56 divisors (see below), whose sum is σ = 3669792. Its totient is φ = 384000.

The previous prime is 1269311. The next prime is 1269337. The reversal of 1269312 is 2139621.

It is a super-2 number, since 2×1269312² = 3222305906688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1269311) 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, 1812 + ... + 2412.

It is an arithmetic number, because the mean of its divisors is an integer number (65532).

2^1269312 is an apocalyptic number.

1269312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1269312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1834896).

1269312 is an abundant number, since it is smaller than the sum of its proper divisors (2400480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1269312 is a wasteful number, since it uses less digits than its factorization.

1269312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 617 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 1269312 is about 1126.6374749670. The cubic root of 1269312 is about 108.2736544410.

It can be divided in two parts, 12 and 69312, that multiplied together give a square (831744 = 912²).

The spelling of 1269312 in words is "one million, two hundred sixty-nine thousand, three hundred twelve".