1285478903 has 2 divisors, whose sum is σ = 1285478904. Its totient is φ = 1285478902.

The previous prime is 1285478899. The next prime is 1285478963. The reversal of 1285478903 is 3098745821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285478903 - 2² = 1285478899 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285478963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642739451 + 642739452.

It is an arithmetic number, because the mean of its divisors is an integer number (642739452).

Almost surely, 2^1285478903 is an apocalyptic number.

1285478903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285478903 is an equidigital number, since it uses as much as digits as its factorization.

1285478903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 1285478903 is about 35853.5758746600. The cubic root of 1285478903 is about 1087.3140114046.

The spelling of 1285478903 in words is "one billion, two hundred eighty-five million, four hundred seventy-eight thousand, nine hundred three".