1285875122 has 64 divisors (see below), whose sum is σ = 2458183680. Its totient is φ = 491774976.

The previous prime is 1285875119. The next prime is 1285875131. The reversal of 1285875122 is 2215785821.

It is a self number, because there is not a number n which added to its sum of digits gives 1285875122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 408338 + ... + 411474.

It is an arithmetic number, because the mean of its divisors is an integer number (38409120).

Almost surely, 2^1285875122 is an apocalyptic number.

1285875122 is the 29279-th pentagonal number.

1285875122 is a deficient number, since it is larger than the sum of its proper divisors (1172308558).

1285875122 is a wasteful number, since it uses less digits than its factorization.

1285875122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255.

The product of its digits is 89600, while the sum is 41.

The square root of 1285875122 is about 35859.1009647481. The cubic root of 1285875122 is about 1087.4257130213.

The spelling of 1285875122 in words is "one billion, two hundred eighty-five million, eight hundred seventy-five thousand, one hundred twenty-two".