117521740 has 24 divisors (see below), whose sum is σ = 282052512. Its totient is φ = 40293120.

The previous prime is 117521689. The next prime is 117521771. The reversal of 117521740 is 47125711.

It is a super-2 number, since 2×117521740² = 27622718745255200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 117521699 and 117521708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419581 + ... + 419860.

It is an arithmetic number, because the mean of its divisors is an integer number (11752188).

Almost surely, 2^117521740 is an apocalyptic number.

117521740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117521740 is an abundant number, since it is smaller than the sum of its proper divisors (164530772).

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

117521740 is a wasteful number, since it uses less digits than its factorization.

117521740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839457 (or 839455 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 117521740 is about 10840.7444393824. The cubic root of 117521740 is about 489.8232598737.

The spelling of 117521740 in words is "one hundred seventeen million, five hundred twenty-one thousand, seven hundred forty".