1308421 has 2 divisors, whose sum is σ = 1308422. Its totient is φ = 1308420.

The previous prime is 1308413. The next prime is 1308457. The reversal of 1308421 is 1248031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 122500 = 1089^2 + 350^2 .

It is an emirp because it is prime and its reverse (1248031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1308421 - 2³ = 1308413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1308491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654210 + 654211.

It is an arithmetic number, because the mean of its divisors is an integer number (654211).

2^1308421 is an apocalyptic number.

It is an amenable number.

1308421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1308421 is an equidigital number, since it uses as much as digits as its factorization.

1308421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1308421 is about 1143.8623168896. The cubic root of 1308421 is about 109.3744382012.

The spelling of 1308421 in words is "one million, three hundred eight thousand, four hundred twenty-one".