1285553361 has 4 divisors (see below), whose sum is σ = 1714071152. Its totient is φ = 857035572.

The previous prime is 1285553341. The next prime is 1285553371. The reversal of 1285553361 is 1633555821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1285553361 - 2⁷ = 1285553233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1285553341) 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 in 3 ways as a sum of consecutive naturals, for example, 214258891 + ... + 214258896.

It is an arithmetic number, because the mean of its divisors is an integer number (428517788).

Almost surely, 2^1285553361 is an apocalyptic number.

It is an amenable number.

1285553361 is a deficient number, since it is larger than the sum of its proper divisors (428517791).

1285553361 is an equidigital number, since it uses as much as digits as its factorization.

1285553361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428517790.

The product of its digits is 108000, while the sum is 39.

The square root of 1285553361 is about 35854.6142218822. The cubic root of 1285553361 is about 1087.3350042718.

The spelling of 1285553361 in words is "one billion, two hundred eighty-five million, five hundred fifty-three thousand, three hundred sixty-one".