1272816 has 30 divisors (see below), whose sum is σ = 3562520. Its totient is φ = 424224.

The previous prime is 1272811. The next prime is 1272827. The reversal of 1272816 is 6182721.

It is a self number, because there is not a number n which added to its sum of digits gives 1272816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4276 + ... + 4563.

2^1272816 is an apocalyptic number.

1272816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1272816 is an abundant number, since it is smaller than the sum of its proper divisors (2289704).

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

1272816 is a wasteful number, since it uses less digits than its factorization.

1272816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8853 (or 8844 counting only the distinct ones).

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

The square root of 1272816 is about 1128.1914731108. The cubic root of 1272816 is about 108.3731945358.

The spelling of 1272816 in words is "one million, two hundred seventy-two thousand, eight hundred sixteen".