1020512240 has 80 divisors (see below), whose sum is σ = 2593200096. Its totient is φ = 370406400.

The previous prime is 1020512237. The next prime is 1020512257. The reversal of 1020512240 is 422150201.

It is a tau number, because it is divible by the number of its divisors (80).

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, 933134 + ... + 934226.

Almost surely, 2^1020512240 is an apocalyptic number.

1020512240 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 1020512240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296600048).

1020512240 is an abundant number, since it is smaller than the sum of its proper divisors (1572687856).

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

1020512240 is a wasteful number, since it uses less digits than its factorization.

1020512240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1020512240 is about 31945.4572670356. The cubic root of 1020512240 is about 1006.7911886858.

Adding to 1020512240 its reverse (422150201), we get a palindrome (1442662441).

The spelling of 1020512240 in words is "one billion, twenty million, five hundred twelve thousand, two hundred forty".