1413221261 has 2 divisors, whose sum is σ = 1413221262. Its totient is φ = 1413221260.

The previous prime is 1413221233. The next prime is 1413221321. The reversal of 1413221261 is 1621223141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 738208900 + 675012361 = 27170^2 + 25981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1413221261 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1413221561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 706610630 + 706610631.

It is an arithmetic number, because the mean of its divisors is an integer number (706610631).

Almost surely, 2^1413221261 is an apocalyptic number.

It is an amenable number.

1413221261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1413221261 is an equidigital number, since it uses as much as digits as its factorization.

1413221261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 1413221261 is about 37592.8352349221. The cubic root of 1413221261 is about 1122.1994568423.

The spelling of 1413221261 in words is "one billion, four hundred thirteen million, two hundred twenty-one thousand, two hundred sixty-one".