2171401 has 8 divisors (see below), whose sum is σ = 2243808. Its totient is φ = 2100000.

The previous prime is 2171387. The next prime is 2171431. The reversal of 2171401 is 1041712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(2171401) divides (2171401-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2171401 is a prime.

It is a deceptive number, since it divides R_2171400.

It is a Duffinian number.

2171401 is a lucky number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2171431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8526 + ... + 8776.

It is an arithmetic number, because the mean of its divisors is an integer number (280476).

It is a Poulet number, since it divides 2^2171400-1.

2^2171401 is an apocalyptic number.

It is an amenable number.

2171401 is a deficient number, since it is larger than the sum of its proper divisors (72407).

2171401 is a wasteful number, since it uses less digits than its factorization.

2171401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 2171401 is about 1473.5674399226. The cubic root of 2171401 is about 129.4931149224.

The spelling of 2171401 in words is "two million, one hundred seventy-one thousand, four hundred one".