1282397531 has 2 divisors, whose sum is σ = 1282397532. Its totient is φ = 1282397530.

The previous prime is 1282397477. The next prime is 1282397551. The reversal of 1282397531 is 1357932821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1282397531 is a prime.

It is a super-2 number, since 2×1282397531² = 3289086855029791922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1282397551) 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, 641198765 + 641198766.

It is an arithmetic number, because the mean of its divisors is an integer number (641198766).

Almost surely, 2^1282397531 is an apocalyptic number.

1282397531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1282397531 is an equidigital number, since it uses as much as digits as its factorization.

1282397531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 1282397531 is about 35810.5784789914. The cubic root of 1282397531 is about 1086.4445301122. Note that the first 3 decimals are identical.

The spelling of 1282397531 in words is "one billion, two hundred eighty-two million, three hundred ninety-seven thousand, five hundred thirty-one".