1272101 has 4 divisors (see below), whose sum is σ = 1277100. Its totient is φ = 1267104.

The previous prime is 1272091. The next prime is 1272109. The reversal of 1272101 is 1012721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51076 + 1221025 = 226^2 + 1105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272101 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2096 + ... + 2633.

It is an arithmetic number, because the mean of its divisors is an integer number (319275).

2^1272101 is an apocalyptic number.

It is an amenable number.

1272101 is a deficient number, since it is larger than the sum of its proper divisors (4999).

1272101 is an equidigital number, since it uses as much as digits as its factorization.

1272101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 1272101 is about 1127.8745497616. The cubic root of 1272101 is about 108.3528979786.

Adding to 1272101 its reverse (1012721), we get a palindrome (2284822).

The spelling of 1272101 in words is "one million, two hundred seventy-two thousand, one hundred one".