1021243552 has 96 divisors (see below), whose sum is σ = 2350736640. Its totient is φ = 427714560.

The previous prime is 1021243543. The next prime is 1021243579. The reversal of 1021243552 is 2553421201.

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, 2496724 + ... + 2497132.

It is an arithmetic number, because the mean of its divisors is an integer number (24486840).

Almost surely, 2^1021243552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021243552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175368320).

1021243552 is an abundant number, since it is smaller than the sum of its proper divisors (1329493088).

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

1021243552 is a wasteful number, since it uses less digits than its factorization.

1021243552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1021243552 is about 31956.9014768328. The cubic root of 1021243552 is about 1007.0316243688.

Adding to 1021243552 its reverse (2553421201), we get a palindrome (3574664753).

The spelling of 1021243552 in words is "one billion, twenty-one million, two hundred forty-three thousand, five hundred fifty-two".