1286652421 has 2 divisors, whose sum is σ = 1286652422. Its totient is φ = 1286652420.

The previous prime is 1286652403. The next prime is 1286652457. The reversal of 1286652421 is 1242566821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731107521 + 555544900 = 27039^2 + 23570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286652421 - 2⁹ = 1286651909 is a prime.

It is a super-2 number, since 2×1286652421² = 3310948904930322482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286659421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643326210 + 643326211.

It is an arithmetic number, because the mean of its divisors is an integer number (643326211).

Almost surely, 2^1286652421 is an apocalyptic number.

It is an amenable number.

1286652421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286652421 is an equidigital number, since it uses as much as digits as its factorization.

1286652421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 1286652421 is about 35869.9375661570. The cubic root of 1286652421 is about 1087.6447816400.

The spelling of 1286652421 in words is "one billion, two hundred eighty-six million, six hundred fifty-two thousand, four hundred twenty-one".