1021249848 has 96 divisors (see below), whose sum is σ = 2784412800. Its totient is φ = 311262336.

The previous prime is 1021249847. The next prime is 1021249883. The reversal of 1021249848 is 8489421201.

It is a Cunningham number, because it is equal to 31957²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021249843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 382165 + ... + 384827.

It is an arithmetic number, because the mean of its divisors is an integer number (29004300).

Almost surely, 2^1021249848 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 1021249848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1392206400).

1021249848 is an abundant number, since it is smaller than the sum of its proper divisors (1763162952).

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

1021249848 is a wasteful number, since it uses less digits than its factorization.

1021249848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749 (or 2716 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 1021249848 is about 31956.9999843540. Note that the first 4 decimals coincide. The cubic root of 1021249848 is about 1007.0336938255.

The spelling of 1021249848 in words is "one billion, twenty-one million, two hundred forty-nine thousand, eight hundred forty-eight".