171961240 has 32 divisors (see below), whose sum is σ = 422087760. Its totient is φ = 62531200.

The previous prime is 171961201. The next prime is 171961243. The reversal of 171961240 is 42169171.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171961243) 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 7 ways as a sum of consecutive naturals, for example, 194971 + ... + 195850.

Almost surely, 2^171961240 is an apocalyptic number.

171961240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171961240 is an abundant number, since it is smaller than the sum of its proper divisors (250126520).

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

171961240 is a wasteful number, since it uses less digits than its factorization.

171961240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390843 (or 390839 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 171961240 is about 13113.3992541980. The cubic root of 171961240 is about 556.0879991143.

The spelling of 171961240 in words is "one hundred seventy-one million, nine hundred sixty-one thousand, two hundred forty".