1220365947 has 16 divisors (see below), whose sum is σ = 1706538240. Its totient is φ = 774245472.

The previous prime is 1220365903. The next prime is 1220365957. The reversal of 1220365947 is 7495630221.

It is not a de Polignac number, because 1220365947 - 2¹⁰ = 1220364923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220365957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31297 + ... + 58482.

It is an arithmetic number, because the mean of its divisors is an integer number (106658640).

Almost surely, 2^1220365947 is an apocalyptic number.

1220365947 is a deficient number, since it is larger than the sum of its proper divisors (486172293).

1220365947 is a wasteful number, since it uses less digits than its factorization.

1220365947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90002.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 1220365947 is about 34933.7365164392. The cubic root of 1220365947 is about 1068.6365569682.

The spelling of 1220365947 in words is "one billion, two hundred twenty million, three hundred sixty-five thousand, nine hundred forty-seven".