1285129103 has 8 divisors (see below), whose sum is σ = 1336572480. Its totient is φ = 1234565280.

The previous prime is 1285129081. The next prime is 1285129121. The reversal of 1285129103 is 3019215821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1285129103 - 2¹² = 1285125007 is a prime.

It is a super-2 number, since 2×1285129103² = 3303113622755169218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285129103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285129123) 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, 216908 + ... + 222753.

It is an arithmetic number, because the mean of its divisors is an integer number (167071560).

Almost surely, 2^1285129103 is an apocalyptic number.

1285129103 is a deficient number, since it is larger than the sum of its proper divisors (51443377).

1285129103 is an equidigital number, since it uses as much as digits as its factorization.

1285129103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439777.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1285129103 is about 35848.6973682448. The cubic root of 1285129103 is about 1087.2153771020.

The spelling of 1285129103 in words is "one billion, two hundred eighty-five million, one hundred twenty-nine thousand, one hundred three".