1220047965 has 24 divisors (see below), whose sum is σ = 2118150528. Its totient is φ = 649645920.

The previous prime is 1220047963. The next prime is 1220047973. The reversal of 1220047965 is 5697400221.

1220047965 is a `hidden beast` number, since 122 + 0 + 0 + 479 + 65 = 666.

It is not a de Polignac number, because 1220047965 - 2¹ = 1220047963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220047963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6912 + ... + 49878.

It is an arithmetic number, because the mean of its divisors is an integer number (88256272).

Almost surely, 2^1220047965 is an apocalyptic number.

1220047965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220047965 is a deficient number, since it is larger than the sum of its proper divisors (898102563).

1220047965 is a wasteful number, since it uses less digits than its factorization.

1220047965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43609 (or 43606 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1220047965 is about 34929.1850033750. The cubic root of 1220047965 is about 1068.5437332518.

The spelling of 1220047965 in words is "one billion, two hundred twenty million, forty-seven thousand, nine hundred sixty-five".