1602417221 has 2 divisors, whose sum is σ = 1602417222. Its totient is φ = 1602417220.

The previous prime is 1602417209. The next prime is 1602417239. The reversal of 1602417221 is 1227142061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1143386596 + 459030625 = 33814^2 + 21425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1602417221 - 2¹⁴ = 1602400837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1602417251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801208610 + 801208611.

It is an arithmetic number, because the mean of its divisors is an integer number (801208611).

Almost surely, 2^1602417221 is an apocalyptic number.

It is an amenable number.

1602417221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1602417221 is an equidigital number, since it uses as much as digits as its factorization.

1602417221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1602417221 is about 40030.2038590862. The cubic root of 1602417221 is about 1170.1957986776.

Adding to 1602417221 its reverse (1227142061), we get a palindrome (2829559282).

The spelling of 1602417221 in words is "one billion, six hundred two million, four hundred seventeen thousand, two hundred twenty-one".