1285526442 has 32 divisors (see below), whose sum is σ = 2775358080. Its totient is φ = 395743040.

The previous prime is 1285526441. The next prime is 1285526443. The reversal of 1285526442 is 2446255821.

It is an interprime number because it is at equal distance from previous prime (1285526441) and next prime (1285526443).

It is a self number, because there is not a number n which added to its sum of digits gives 1285526442.

It is not an unprimeable number, because it can be changed into a prime (1285526441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156609 + ... + 164612.

It is an arithmetic number, because the mean of its divisors is an integer number (86729940).

Almost surely, 2^1285526442 is an apocalyptic number.

1285526442 is an abundant number, since it is smaller than the sum of its proper divisors (1489831638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285526442 is a wasteful number, since it uses less digits than its factorization.

1285526442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321278.

The product of its digits is 153600, while the sum is 39.

The square root of 1285526442 is about 35854.2388289028. The cubic root of 1285526442 is about 1087.3274147579.

The spelling of 1285526442 in words is "one billion, two hundred eighty-five million, five hundred twenty-six thousand, four hundred forty-two".