1272940 has 12 divisors (see below), whose sum is σ = 2673216. Its totient is φ = 509168.

The previous prime is 1272937. The next prime is 1272941. The reversal of 1272940 is 492721.

It is not an unprimeable number, because it can be changed into a prime (1272941) 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 3 ways as a sum of consecutive naturals, for example, 31804 + ... + 31843.

It is an arithmetic number, because the mean of its divisors is an integer number (222768).

2^1272940 is an apocalyptic number.

1272940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272940 is an abundant number, since it is smaller than the sum of its proper divisors (1400276).

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

1272940 is a wasteful number, since it uses less digits than its factorization.

1272940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63656 (or 63654 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1272940 is about 1128.2464269830. The cubic root of 1272940 is about 108.3767137246.

It can be divided in two parts, 12729 and 40, that added together give a square (12769 = 113²).

The spelling of 1272940 in words is "one million, two hundred seventy-two thousand, nine hundred forty".