171421380 has 96 divisors (see below), whose sum is σ = 574358400. Its totient is φ = 42194304.

The previous prime is 171421379. The next prime is 171421381. The reversal of 171421380 is 83124171.

It is an interprime number because it is at equal distance from previous prime (171421379) and next prime (171421381).

It is a super-2 number, since 2×171421380² = 58770579042208800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171421381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5190 + ... + 19229.

It is an arithmetic number, because the mean of its divisors is an integer number (5982900).

Almost surely, 2^171421380 is an apocalyptic number.

171421380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171421380 is an abundant number, since it is smaller than the sum of its proper divisors (402937020).

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

171421380 is a wasteful number, since it uses less digits than its factorization.

171421380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24450 (or 24442 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 171421380 is about 13092.7987840645. The cubic root of 171421380 is about 555.5054562526.

The spelling of 171421380 in words is "one hundred seventy-one million, four hundred twenty-one thousand, three hundred eighty".