1294713221 has 2 divisors, whose sum is σ = 1294713222. Its totient is φ = 1294713220.

The previous prime is 1294713209. The next prime is 1294713271. The reversal of 1294713221 is 1223174921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1173405025 + 121308196 = 34255^2 + 11014^2 .

It is an emirp because it is prime and its reverse (1223174921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1294713221 - 2²² = 1290518917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1294713271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647356610 + 647356611.

It is an arithmetic number, because the mean of its divisors is an integer number (647356611).

Almost surely, 2^1294713221 is an apocalyptic number.

It is an amenable number.

1294713221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1294713221 is an equidigital number, since it uses as much as digits as its factorization.

1294713221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 1294713221 is about 35982.1236310477. The cubic root of 1294713221 is about 1089.9113978425.

The spelling of 1294713221 in words is "one billion, two hundred ninety-four million, seven hundred thirteen thousand, two hundred twenty-one".