1220079671 has 4 divisors (see below), whose sum is σ = 1222310712. Its totient is φ = 1217848632.

The previous prime is 1220079631. The next prime is 1220079701. The reversal of 1220079671 is 1769700221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220079671 - 2³⁰ = 146337847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220079631) 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, 1114700 + ... + 1115793.

It is an arithmetic number, because the mean of its divisors is an integer number (305577678).

Almost surely, 2^1220079671 is an apocalyptic number.

1220079671 is a deficient number, since it is larger than the sum of its proper divisors (2231041).

1220079671 is an equidigital number, since it uses as much as digits as its factorization.

1220079671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231040.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 1220079671 is about 34929.6388615743. The cubic root of 1220079671 is about 1068.5529894328.

Adding to 1220079671 its reverse (1769700221), we get a palindrome (2989779892).

The spelling of 1220079671 in words is "one billion, two hundred twenty million, seventy-nine thousand, six hundred seventy-one".