201478 has 8 divisors (see below), whose sum is σ = 304920. Its totient is φ = 99840.

The previous prime is 201473. The next prime is 201491. The reversal of 201478 is 874102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123 + ... + 646.

It is an arithmetic number, because the mean of its divisors is an integer number (38115).

2²⁰¹⁴⁷⁸ is an apocalyptic number.

201478 is a deficient number, since it is larger than the sum of its proper divisors (103442).

201478 is a wasteful number, since it uses less digits than its factorization.

201478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 201478 is about 448.8630080548. The cubic root of 201478 is about 58.6240579618.

The spelling of 201478 in words is "two hundred one thousand, four hundred seventy-eight".