1285734553 has 2 divisors, whose sum is σ = 1285734554. Its totient is φ = 1285734552.

The previous prime is 1285734533. The next prime is 1285734581. The reversal of 1285734553 is 3554375821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1275061264 + 10673289 = 35708^2 + 3267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285734553 - 2⁹ = 1285734041 is a prime.

It is a super-2 number, since 2×1285734553² = 3306226681556219618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1285734533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642867276 + 642867277.

It is an arithmetic number, because the mean of its divisors is an integer number (642867277).

Almost surely, 2^1285734553 is an apocalyptic number.

It is an amenable number.

1285734553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285734553 is an equidigital number, since it uses as much as digits as its factorization.

1285734553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 43.

The square root of 1285734553 is about 35857.1408927148. The cubic root of 1285734553 is about 1087.3860865929.

The spelling of 1285734553 in words is "one billion, two hundred eighty-five million, seven hundred thirty-four thousand, five hundred fifty-three".