1272739 has 12 divisors (see below), whose sum is σ = 1462536. Its totient is φ = 1103232.

The previous prime is 1272679. The next prime is 1272749. The reversal of 1272739 is 9372721.

It is not a de Polignac number, because 1272739 - 2¹⁵ = 1239971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272739.

It is not an unprimeable number, because it can be changed into a prime (1272749) 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, 2652 + ... + 3094.

It is an arithmetic number, because the mean of its divisors is an integer number (121878).

2^1272739 is an apocalyptic number.

1272739 is a deficient number, since it is larger than the sum of its proper divisors (189797).

1272739 is a wasteful number, since it uses less digits than its factorization.

1272739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 473 counting only the distinct ones).

The product of its digits is 5292, while the sum is 31.

The square root of 1272739 is about 1128.1573471817. The cubic root of 1272739 is about 108.3710091180.

The spelling of 1272739 in words is "one million, two hundred seventy-two thousand, seven hundred thirty-nine".