1282474021 has 2 divisors, whose sum is σ = 1282474022. Its totient is φ = 1282474020.

The previous prime is 1282473977. The next prime is 1282474031. The reversal of 1282474021 is 1204742821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1252168996 + 30305025 = 35386^2 + 5505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1282474021 - 2¹⁹ = 1281949733 is a prime.

It is a super-3 number, since 3×1282474021³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1282474031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641237010 + 641237011.

It is an arithmetic number, because the mean of its divisors is an integer number (641237011).

Almost surely, 2^1282474021 is an apocalyptic number.

It is an amenable number.

1282474021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1282474021 is an equidigital number, since it uses as much as digits as its factorization.

1282474021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 1282474021 is about 35811.6464435803. The cubic root of 1282474021 is about 1086.4661304059.

The spelling of 1282474021 in words is "one billion, two hundred eighty-two million, four hundred seventy-four thousand, twenty-one".