1242819552 has 192 divisors, whose sum is σ = 3648685824. Its totient is φ = 367964160.

The previous prime is 1242819533. The next prime is 1242819569. The reversal of 1242819552 is 2559182421.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1242819552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5474863 + ... + 5475089.

It is an arithmetic number, because the mean of its divisors is an integer number (19003572).

Almost surely, 2^1242819552 is an apocalyptic number.

1242819552 is a gapful number since it is divisible by the number (12) 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 1242819552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1824342912).

1242819552 is an abundant number, since it is smaller than the sum of its proper divisors (2405866272).

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

1242819552 is a wasteful number, since it uses less digits than its factorization.

1242819552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 393 counting only the distinct ones).

The product of its digits is 57600, while the sum is 39.

The square root of 1242819552 is about 35253.6459391082. The cubic root of 1242819552 is about 1075.1507420124.

The spelling of 1242819552 in words is "one billion, two hundred forty-two million, eight hundred nineteen thousand, five hundred fifty-two".