1272115 has 8 divisors (see below), whose sum is σ = 1644048. Its totient is φ = 939360.

The previous prime is 1272113. The next prime is 1272133. The reversal of 1272115 is 5112721.

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

It is not a de Polignac number, because 1272115 - 2¹ = 1272113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1272092 and 1272101.

It is not an unprimeable number, because it can be changed into a prime (1272113) 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, 9721 + ... + 9850.

It is an arithmetic number, because the mean of its divisors is an integer number (205506).

2^1272115 is an apocalyptic number.

1272115 is a deficient number, since it is larger than the sum of its proper divisors (371933).

1272115 is a wasteful number, since it uses less digits than its factorization.

1272115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19589.

The product of its digits is 140, while the sum is 19.

The square root of 1272115 is about 1127.8807561086. The cubic root of 1272115 is about 108.3532954667.

Adding to 1272115 its reverse (5112721), we get a palindrome (6384836).

Subtracting 1272115 from its reverse (5112721), we obtain a triangular number (3840606 = T₂₇₇₁).

It can be divided in two parts, 12 and 72115, that added together give a palindrome (72127).

The spelling of 1272115 in words is "one million, two hundred seventy-two thousand, one hundred fifteen".