1421535281 has 2 divisors, whose sum is σ = 1421535282. Its totient is φ = 1421535280.

The previous prime is 1421535197. The next prime is 1421535289. The reversal of 1421535281 is 1825351241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1261386256 + 160149025 = 35516^2 + 12655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421535281 is a prime.

It is a super-2 number, since 2×1421535281² = 4041525110255497922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1421535289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710767640 + 710767641.

It is an arithmetic number, because the mean of its divisors is an integer number (710767641).

Almost surely, 2^1421535281 is an apocalyptic number.

It is an amenable number.

1421535281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421535281 is an equidigital number, since it uses as much as digits as its factorization.

1421535281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 32.

The square root of 1421535281 is about 37703.2529233221. The cubic root of 1421535281 is about 1124.3957989522.

The spelling of 1421535281 in words is "one billion, four hundred twenty-one million, five hundred thirty-five thousand, two hundred eighty-one".