1272205 has 8 divisors (see below), whose sum is σ = 1665504. Its totient is φ = 925200.

The previous prime is 1272203. The next prime is 1272211. The reversal of 1272205 is 5022721.

1272205 = T₁₈₇ + T₁₈₈ + ... + T₂₄₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1272205 - 2¹ = 1272203 is a prime.

It is a super-4 number, since 4×1272205⁴ (a number of 26 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272203) 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 7 ways as a sum of consecutive naturals, for example, 11511 + ... + 11620.

It is an arithmetic number, because the mean of its divisors is an integer number (208188).

2^1272205 is an apocalyptic number.

It is an amenable number.

1272205 is a deficient number, since it is larger than the sum of its proper divisors (393299).

1272205 is a wasteful number, since it uses less digits than its factorization.

1272205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23147.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 1272205 is about 1127.9206532376. The cubic root of 1272205 is about 108.3558506777.

Adding to 1272205 its reverse (5022721), we get a palindrome (6294926).

It can be divided in two parts, 127 and 2205, that added together give a palindrome (2332).

The spelling of 1272205 in words is "one million, two hundred seventy-two thousand, two hundred five".