1285307090 has 16 divisors (see below), whose sum is σ = 2342839680. Its totient is φ = 507614640.

The previous prime is 1285307077. The next prime is 1285307099. The reversal of 1285307090 is 907035821.

It is a self number, because there is not a number n which added to its sum of digits gives 1285307090.

It is not an unprimeable number, because it can be changed into a prime (1285307099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812696 + ... + 814275.

It is an arithmetic number, because the mean of its divisors is an integer number (146427480).

Almost surely, 2^1285307090 is an apocalyptic number.

1285307090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1285307090 is a deficient number, since it is larger than the sum of its proper divisors (1057532590).

1285307090 is a wasteful number, since it uses less digits than its factorization.

1285307090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627057.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1285307090 is about 35851.1797574362. The cubic root of 1285307090 is about 1087.2655669415.

The spelling of 1285307090 in words is "one billion, two hundred eighty-five million, three hundred seven thousand, ninety".