1315282421 has 2 divisors, whose sum is σ = 1315282422. Its totient is φ = 1315282420.

The previous prime is 1315282417. The next prime is 1315282433. The reversal of 1315282421 is 1242825131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1299963025 + 15319396 = 36055^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315282421 - 2² = 1315282417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315282411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657641210 + 657641211.

It is an arithmetic number, because the mean of its divisors is an integer number (657641211).

Almost surely, 2^1315282421 is an apocalyptic number.

It is an amenable number.

1315282421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315282421 is an equidigital number, since it uses as much as digits as its factorization.

1315282421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 29.

The square root of 1315282421 is about 36266.8225931084. The cubic root of 1315282421 is about 1095.6529319683.

The spelling of 1315282421 in words is "one billion, three hundred fifteen million, two hundred eighty-two thousand, four hundred twenty-one".