1272981 has 16 divisors (see below), whose sum is σ = 1866240. Its totient is φ = 768240.

The previous prime is 1272961. The next prime is 1272983. The reversal of 1272981 is 1892721.

It is not a de Polignac number, because 1272981 - 2⁶ = 1272917 is a prime.

It is a super-2 number, since 2×1272981² = 3240961252722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826 + ... + 1796.

It is an arithmetic number, because the mean of its divisors is an integer number (116640).

2^1272981 is an apocalyptic number.

It is an amenable number.

1272981 is a deficient number, since it is larger than the sum of its proper divisors (593259).

1272981 is a wasteful number, since it uses less digits than its factorization.

1272981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016.

The product of its digits is 2016, while the sum is 30.

The square root of 1272981 is about 1128.2645966262. The cubic root of 1272981 is about 108.3778772771.

Multiplying 1272981 by its sum of digits (30), we get a triangular number (38189430 = T₈₇₃₉).

The spelling of 1272981 in words is "one million, two hundred seventy-two thousand, nine hundred eighty-one".