1272557 has 12 divisors (see below), whose sum is σ = 1508220. Its totient is φ = 1066560.

The previous prime is 1272547. The next prime is 1272559. The reversal of 1272557 is 7552721.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 609961 = 814^2 + 781^2 .

It is not a de Polignac number, because 1272557 - 2¹² = 1268461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1169 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (125685).

2^1272557 is an apocalyptic number.

It is an amenable number.

1272557 is a deficient number, since it is larger than the sum of its proper divisors (235663).

1272557 is a wasteful number, since it uses less digits than its factorization.

1272557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 833 counting only the distinct ones).

The product of its digits is 4900, while the sum is 29.

The square root of 1272557 is about 1128.0766817907. The cubic root of 1272557 is about 108.3658432345.

The spelling of 1272557 in words is "one million, two hundred seventy-two thousand, five hundred fifty-seven".