1248100820 has 48 divisors (see below), whose sum is σ = 2655329040. Its totient is φ = 492742656.

The previous prime is 1248100807. The next prime is 1248100829. The reversal of 1248100820 is 280018421.

It can be written as a sum of positive squares in 8 ways, for example, as 459502096 + 788598724 = 21436^2 + 28082^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1248100820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248100829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606914 + ... + 608966.

It is an arithmetic number, because the mean of its divisors is an integer number (55319355).

Almost surely, 2^1248100820 is an apocalyptic number.

1248100820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1248100820 is an abundant number, since it is smaller than the sum of its proper divisors (1407228220).

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

1248100820 is a wasteful number, since it uses less digits than its factorization.

1248100820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444 (or 2442 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 1248100820 is about 35328.4703886257. The cubic root of 1248100820 is about 1076.6715139175.

The spelling of 1248100820 in words is "one billion, two hundred forty-eight million, one hundred thousand, eight hundred twenty".