117021520 has 160 divisors (see below), whose sum is σ = 344192256. Its totient is φ = 36241920.

The previous prime is 117021517. The next prime is 117021599. The reversal of 117021520 is 25120711.

117021520 = 348² + 349² + ... + 732².

It is a super-2 number, since 2×117021520² = 27388072286220800, which contains 22 as substring.

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, 745282 + ... + 745438.

Almost surely, 2^117021520 is an apocalyptic number.

117021520 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 117021520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172096128).

117021520 is an abundant number, since it is smaller than the sum of its proper divisors (227170736).

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

117021520 is a wasteful number, since it uses less digits than its factorization.

117021520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 117021520 is about 10817.6485430060. The cubic root of 117021520 is about 489.1273096343.

The spelling of 117021520 in words is "one hundred seventeen million, twenty-one thousand, five hundred twenty".