1281672 has 48 divisors (see below), whose sum is σ = 3968640. Its totient is φ = 366048.

The previous prime is 1281667. The next prime is 1281673. The reversal of 1281672 is 2761821.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1281673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 768 + ... + 1775.

It is an arithmetic number, because the mean of its divisors is an integer number (82680).

2^1281672 is an apocalyptic number.

1281672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1281672 is an abundant number, since it is smaller than the sum of its proper divisors (2686968).

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

1281672 is a wasteful number, since it uses less digits than its factorization.

1281672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562 (or 2555 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1281672 is about 1132.1095353366. The cubic root of 1281672 is about 108.6239602007.

It can be divided in two parts, 1281 and 672, that added together give a triangular number (1953 = T₆₂).

The spelling of 1281672 in words is "one million, two hundred eighty-one thousand, six hundred seventy-two".