1285943126 has 16 divisors (see below), whose sum is σ = 2078152944. Its totient is φ = 593266464.

The previous prime is 1285943101. The next prime is 1285943203. The reversal of 1285943126 is 6213495821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63881 + ... + 81563.

It is an arithmetic number, because the mean of its divisors is an integer number (129884559).

Almost surely, 2^1285943126 is an apocalyptic number.

1285943126 is a deficient number, since it is larger than the sum of its proper divisors (792209818).

1285943126 is a wasteful number, since it uses less digits than its factorization.

1285943126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20495.

The product of its digits is 103680, while the sum is 41.

The square root of 1285943126 is about 35860.0491633796. The cubic root of 1285943126 is about 1087.4448823256. Note that the first 3 decimals are identical.

The spelling of 1285943126 in words is "one billion, two hundred eighty-five million, nine hundred forty-three thousand, one hundred twenty-six".