1285659653 has 2 divisors, whose sum is σ = 1285659654. Its totient is φ = 1285659652.

The previous prime is 1285659611. The next prime is 1285659679. The reversal of 1285659653 is 3569565821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1043483809 + 242175844 = 32303^2 + 15562^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285659653 - 2¹⁶ = 1285594117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285659553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642829826 + 642829827.

It is an arithmetic number, because the mean of its divisors is an integer number (642829827).

Almost surely, 2^1285659653 is an apocalyptic number.

It is an amenable number.

1285659653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285659653 is an equidigital number, since it uses as much as digits as its factorization.

1285659653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 50.

The square root of 1285659653 is about 35856.0964551358. The cubic root of 1285659653 is about 1087.3649710889.

The spelling of 1285659653 in words is "one billion, two hundred eighty-five million, six hundred fifty-nine thousand, six hundred fifty-three".