1285162620 has 48 divisors (see below), whose sum is σ = 4112521728. Its totient is φ = 293751360.

The previous prime is 1285162609. The next prime is 1285162633. The reversal of 1285162620 is 262615821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1529536 + ... + 1530375.

It is an arithmetic number, because the mean of its divisors is an integer number (85677536).

Almost surely, 2^1285162620 is an apocalyptic number.

1285162620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285162620 is an abundant number, since it is smaller than the sum of its proper divisors (2827359108).

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

1285162620 is a wasteful number, since it uses less digits than its factorization.

1285162620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059930 (or 3059928 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1285162620 is about 35849.1648438286. The cubic root of 1285162620 is about 1087.2248287804.

The spelling of 1285162620 in words is "one billion, two hundred eighty-five million, one hundred sixty-two thousand, six hundred twenty".