171420901 has 4 divisors (see below), whose sum is σ = 174326400. Its totient is φ = 168515404.

The previous prime is 171420883. The next prime is 171420913. The reversal of 171420901 is 109024171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171420901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171426901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1452661 + ... + 1452778.

It is an arithmetic number, because the mean of its divisors is an integer number (43581600).

Almost surely, 2^171420901 is an apocalyptic number.

It is an amenable number.

171420901 is a deficient number, since it is larger than the sum of its proper divisors (2905499).

171420901 is an equidigital number, since it uses as much as digits as its factorization.

171420901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905498.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 171420901 is about 13092.7804915534. The cubic root of 171420901 is about 555.5049388388.

The spelling of 171420901 in words is "one hundred seventy-one million, four hundred twenty thousand, nine hundred one".