1285245120 has 224 divisors, whose sum is σ = 4435937280. Its totient is φ = 314081280.

The previous prime is 1285245097. The next prime is 1285245133. The reversal of 1285245120 is 215425821.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 564304 + ... + 566576.

Almost surely, 2^1285245120 is an apocalyptic number.

1285245120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285245120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2217968640).

1285245120 is an abundant number, since it is smaller than the sum of its proper divisors (3150692160).

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

1285245120 is a wasteful number, since it uses less digits than its factorization.

1285245120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2333 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 1285245120 is about 35850.3154797834. The cubic root of 1285245120 is about 1087.2480927958.

The spelling of 1285245120 in words is "one billion, two hundred eighty-five million, two hundred forty-five thousand, one hundred twenty".