171420051 has 16 divisors (see below), whose sum is σ = 249562368. Its totient is φ = 103797600.

The previous prime is 171420047. The next prime is 171420077. The reversal of 171420051 is 150024171.

It is a happy number.

It is not a de Polignac number, because 171420051 - 2² = 171420047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (171420031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59005 + ... + 61841.

It is an arithmetic number, because the mean of its divisors is an integer number (15597648).

Almost surely, 2^171420051 is an apocalyptic number.

171420051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

171420051 is a deficient number, since it is larger than the sum of its proper divisors (78142317).

171420051 is a wasteful number, since it uses less digits than its factorization.

171420051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 171420051 is about 13092.7480308757. The cubic root of 171420051 is about 555.5040206700.

The spelling of 171420051 in words is "one hundred seventy-one million, four hundred twenty thousand, fifty-one".