1285408247 has 2 divisors, whose sum is σ = 1285408248. Its totient is φ = 1285408246.

The previous prime is 1285408213. The next prime is 1285408259. The reversal of 1285408247 is 7428045821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1285408247 - 2¹⁶ = 1285342711 is a prime.

It is a super-2 number, since 2×1285408247² = 3304548722911226018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285408277) 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, 642704123 + 642704124.

It is an arithmetic number, because the mean of its divisors is an integer number (642704124).

Almost surely, 2^1285408247 is an apocalyptic number.

1285408247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285408247 is an equidigital number, since it uses as much as digits as its factorization.

1285408247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 143360, while the sum is 41.

The square root of 1285408247 is about 35852.5905200726. The cubic root of 1285408247 is about 1087.2940897329.

The spelling of 1285408247 in words is "one billion, two hundred eighty-five million, four hundred eight thousand, two hundred forty-seven".