1020252144 has 40 divisors (see below), whose sum is σ = 2790691920. Its totient is φ = 320078848.

The previous prime is 1020252143. The next prime is 1020252151. The reversal of 1020252144 is 4412520201.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1020252144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020252143) 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, 624339 + ... + 625970.

It is an arithmetic number, because the mean of its divisors is an integer number (69767298).

Almost surely, 2^1020252144 is an apocalyptic number.

It is an amenable number.

1020252144 is an abundant number, since it is smaller than the sum of its proper divisors (1770439776).

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

1020252144 is a wasteful number, since it uses less digits than its factorization.

1020252144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250337 (or 1250331 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1020252144 is about 31941.3860688606. The cubic root of 1020252144 is about 1006.7056484376.

Adding to 1020252144 its reverse (4412520201), we get a palindrome (5432772345).

The spelling of 1020252144 in words is "one billion, twenty million, two hundred fifty-two thousand, one hundred forty-four".