1421615317 has 2 divisors, whose sum is σ = 1421615318. Its totient is φ = 1421615316.

The previous prime is 1421615311. The next prime is 1421615333. The reversal of 1421615317 is 7135161241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1397712996 + 23902321 = 37386^2 + 4889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421615317 - 2⁷ = 1421615189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421615311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710807658 + 710807659.

It is an arithmetic number, because the mean of its divisors is an integer number (710807659).

Almost surely, 2^1421615317 is an apocalyptic number.

It is an amenable number.

1421615317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421615317 is an equidigital number, since it uses as much as digits as its factorization.

1421615317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 1421615317 is about 37704.3143022122. The cubic root of 1421615317 is about 1124.4169006570.

Adding to 1421615317 its reverse (7135161241), we get a palindrome (8556776558).

The spelling of 1421615317 in words is "one billion, four hundred twenty-one million, six hundred fifteen thousand, three hundred seventeen".