1285642092 has 24 divisors (see below), whose sum is σ = 3428379136. Its totient is φ = 367326288.

The previous prime is 1285642081. The next prime is 1285642097. The reversal of 1285642092 is 2902465821.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1285642092.

It is not an unprimeable number, because it can be changed into a prime (1285642097) 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, 7652548 + ... + 7652715.

Almost surely, 2^1285642092 is an apocalyptic number.

1285642092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1285642092 is an abundant number, since it is smaller than the sum of its proper divisors (2142737044).

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

1285642092 is a wasteful number, since it uses less digits than its factorization.

1285642092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15305277 (or 15305275 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1285642092 is about 35855.8515726513. The cubic root of 1285642092 is about 1087.3600202443.

The spelling of 1285642092 in words is "one billion, two hundred eighty-five million, six hundred forty-two thousand, ninety-two".