1220873461 has 2 divisors, whose sum is σ = 1220873462. Its totient is φ = 1220873460.

The previous prime is 1220873453. The next prime is 1220873483. The reversal of 1220873461 is 1643780221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 789272836 + 431600625 = 28094^2 + 20775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220873461 - 2³ = 1220873453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220873491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610436730 + 610436731.

It is an arithmetic number, because the mean of its divisors is an integer number (610436731).

Almost surely, 2^1220873461 is an apocalyptic number.

It is an amenable number.

1220873461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220873461 is an equidigital number, since it uses as much as digits as its factorization.

1220873461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1220873461 is about 34940.9997138033. Note that the first 3 decimals coincide. The cubic root of 1220873461 is about 1068.7846745199.

The spelling of 1220873461 in words is "one billion, two hundred twenty million, eight hundred seventy-three thousand, four hundred sixty-one".