1197947520 has 768 divisors, whose sum is σ = 5369345280. Its totient is φ = 238878720.

The previous prime is 1197947489. The next prime is 1197947521. The reversal of 1197947520 is 257497911.

1197947520 is a `hidden beast` number, since 1 + 19 + 79 + 47 + 520 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197947521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16410204 + ... + 16410276.

It is an arithmetic number, because the mean of its divisors is an integer number (6991335).

Almost surely, 2^1197947520 is an apocalyptic number.

1197947520 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 1197947520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2684672640).

1197947520 is an abundant number, since it is smaller than the sum of its proper divisors (4171397760).

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

1197947520 is a wasteful number, since it uses less digits than its factorization.

1197947520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 1197947520 is about 34611.3784758712. The cubic root of 1197947520 is about 1062.0523663625.

The spelling of 1197947520 in words is "one billion, one hundred ninety-seven million, nine hundred forty-seven thousand, five hundred twenty".