1307421421 has 2 divisors, whose sum is σ = 1307421422. Its totient is φ = 1307421420.

The previous prime is 1307421403. The next prime is 1307421433. The reversal of 1307421421 is 1241247031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 701720100 + 605701321 = 26490^2 + 24611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1307421421 - 2¹⁷ = 1307290349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1307421491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653710710 + 653710711.

It is an arithmetic number, because the mean of its divisors is an integer number (653710711).

Almost surely, 2^1307421421 is an apocalyptic number.

It is an amenable number.

1307421421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1307421421 is an equidigital number, since it uses as much as digits as its factorization.

1307421421 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 25.

The square root of 1307421421 is about 36158.2828823494. The cubic root of 1307421421 is about 1093.4657860449.

Adding to 1307421421 its reverse (1241247031), we get a palindrome (2548668452).

The spelling of 1307421421 in words is "one billion, three hundred seven million, four hundred twenty-one thousand, four hundred twenty-one".