1220571707 has 4 divisors (see below), whose sum is σ = 1220736816. Its totient is φ = 1220406600.

The previous prime is 1220571673. The next prime is 1220571713. The reversal of 1220571707 is 7071750221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7071750221 = 47207 ⋅149803.

It is a cyclic number.

It is not a de Polignac number, because 1220571707 - 2⁶ = 1220571643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220571757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70919 + ... + 86432.

It is an arithmetic number, because the mean of its divisors is an integer number (305184204).

Almost surely, 2^1220571707 is an apocalyptic number.

1220571707 is a deficient number, since it is larger than the sum of its proper divisors (165109).

1220571707 is an equidigital number, since it uses as much as digits as its factorization.

1220571707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165108.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 1220571707 is about 34936.6813964921. The cubic root of 1220571707 is about 1068.6966128069.

The spelling of 1220571707 in words is "one billion, two hundred twenty million, five hundred seventy-one thousand, seven hundred seven".