1272417 has 4 divisors (see below), whose sum is σ = 1696560. Its totient is φ = 848276.

The previous prime is 1272409. The next prime is 1272421. The reversal of 1272417 is 7142721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7142721 = 3 ⋅2380907.

It is a cyclic number.

It is not a de Polignac number, because 1272417 - 2³ = 1272409 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1272617) 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, 212067 + ... + 212072.

It is an arithmetic number, because the mean of its divisors is an integer number (424140).

2^1272417 is an apocalyptic number.

It is an amenable number.

1272417 is a deficient number, since it is larger than the sum of its proper divisors (424143).

1272417 is an equidigital number, since it uses as much as digits as its factorization.

1272417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424142.

The product of its digits is 784, while the sum is 24.

The square root of 1272417 is about 1128.0146275647. The cubic root of 1272417 is about 108.3618691429.

The spelling of 1272417 in words is "one million, two hundred seventy-two thousand, four hundred seventeen".