1197782520 has 128 divisors (see below), whose sum is σ = 3928400640. Its totient is φ = 289751040.

The previous prime is 1197782513. The next prime is 1197782527. The reversal of 1197782520 is 252877911.

It is an interprime number because it is at equal distance from previous prime (1197782513) and next prime (1197782527).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197782527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1038264 + ... + 1039416.

It is an arithmetic number, because the mean of its divisors is an integer number (30690630).

Almost surely, 2^1197782520 is an apocalyptic number.

1197782520 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 1197782520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1964200320).

1197782520 is an abundant number, since it is smaller than the sum of its proper divisors (2730618120).

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

1197782520 is a wasteful number, since it uses less digits than its factorization.

1197782520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1961 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 1197782520 is about 34608.9947845932. The cubic root of 1197782520 is about 1062.0036033230.

The spelling of 1197782520 in words is "one billion, one hundred ninety-seven million, seven hundred eighty-two thousand, five hundred twenty".