1272123 has 12 divisors (see below), whose sum is σ = 1856088. Its totient is φ = 839520.

The previous prime is 1272113. The next prime is 1272133. The reversal of 1272123 is 3212721.

It is an interprime number because it is at equal distance from previous prime (1272113) and next prime (1272133).

It is not a de Polignac number, because 1272123 - 2⁵ = 1272091 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 1272096 and 1272105.

It is not an unprimeable number, because it can be changed into a prime (1272113) 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, 303 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (154674).

2^1272123 is an apocalyptic number.

1272123 is a deficient number, since it is larger than the sum of its proper divisors (583965).

1272123 is a wasteful number, since it uses less digits than its factorization.

1272123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434 (or 1431 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 1272123 is about 1127.8843025772. The cubic root of 1272123 is about 108.3535226015.

Adding to 1272123 its reverse (3212721), we get a palindrome (4484844).

The spelling of 1272123 in words is "one million, two hundred seventy-two thousand, one hundred twenty-three".