401187 has 8 divisors (see below), whose sum is σ = 538704. Its totient is φ = 265568.

The previous prime is 401179. The next prime is 401201. The reversal of 401187 is 781104.

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

It is a cyclic number.

It is not a de Polignac number, because 401187 - 2³ = 401179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401087) 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, 133 + ... + 905.

It is an arithmetic number, because the mean of its divisors is an integer number (67338).

2⁴⁰¹¹⁸⁷ is an apocalyptic number.

401187 is a deficient number, since it is larger than the sum of its proper divisors (137517).

401187 is a wasteful number, since it uses less digits than its factorization.

401187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 401187 is about 633.3932427805. The cubic root of 401187 is about 73.7534404217.

The spelling of 401187 in words is "four hundred one thousand, one hundred eighty-seven".