1272591 has 12 divisors (see below), whose sum is σ = 1906632. Its totient is φ = 848232.

The previous prime is 1272589. The next prime is 1272617. The reversal of 1272591 is 1952721.

1272591 is a `hidden beast` number, since 1 + 2 + 72 + 591 = 666.

It is not a de Polignac number, because 1272591 - 2¹ = 1272589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272091) 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, 2376 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (158886).

2^1272591 is an apocalyptic number.

1272591 is a deficient number, since it is larger than the sum of its proper divisors (634041).

1272591 is an frugal number, since it uses more digits than its factorization.

1272591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252 (or 5240 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1272591 is about 1128.0917515876. The cubic root of 1272591 is about 108.3668083271.

It can be divided in two parts, 127259 and 1, that added together give a triangular number (127260 = T₅₀₄).

The spelling of 1272591 in words is "one million, two hundred seventy-two thousand, five hundred ninety-one".