1242788760 has 192 divisors, whose sum is σ = 4198222080. Its totient is φ = 318504960.

The previous prime is 1242788753. The next prime is 1242788801. The reversal of 1242788760 is 678872421.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2153592 + ... + 2154168.

It is an arithmetic number, because the mean of its divisors is an integer number (21865740).

Almost surely, 2^1242788760 is an apocalyptic number.

1242788760 is a gapful number since it is divisible by the number (10) 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 1242788760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2099111040).

1242788760 is an abundant number, since it is smaller than the sum of its proper divisors (2955433320).

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

1242788760 is a wasteful number, since it uses less digits than its factorization.

1242788760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 1242788760 is about 35253.2092156161. The cubic root of 1242788760 is about 1075.1418626556.

The spelling of 1242788760 in words is "one billion, two hundred forty-two million, seven hundred eighty-eight thousand, seven hundred sixty".