401642 has 8 divisors (see below), whose sum is σ = 637956. Its totient is φ = 188992.

The previous prime is 401629. The next prime is 401651. The reversal of 401642 is 246104.

It can be written as a sum of positive squares in 2 ways, for example, as 398161 + 3481 = 631^2 + 59^2 .

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

It is a super-4 number, since 4×401642⁴ (a number of 24 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 401642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5873 + ... + 5940.

2⁴⁰¹⁶⁴² is an apocalyptic number.

401642 is a deficient number, since it is larger than the sum of its proper divisors (236314).

401642 is a wasteful number, since it uses less digits than its factorization.

401642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11832.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 401642 is about 633.7523175500. The cubic root of 401642 is about 73.7813119937.

Adding to 401642 its reverse (246104), we get a palindrome (647746).

The spelling of 401642 in words is "four hundred one thousand, six hundred forty-two".