401895 has 32 divisors (see below), whose sum is σ = 772800. Its totient is φ = 196992.

The previous prime is 401887. The next prime is 401903. The reversal of 401895 is 598104.

It is an interprime number because it is at equal distance from previous prime (401887) and next prime (401903).

It is not a de Polignac number, because 401895 - 2³ = 401887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1641 + ... + 1869.

It is an arithmetic number, because the mean of its divisors is an integer number (24150).

2⁴⁰¹⁸⁹⁵ is an apocalyptic number.

401895 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

401895 is a deficient number, since it is larger than the sum of its proper divisors (370905).

401895 is a wasteful number, since it uses less digits than its factorization.

401895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 401895 is about 633.9518909192. The cubic root of 401895 is about 73.7968007074.

Adding to 401895 its reverse (598104), we get a palindrome (999999).

It can be divided in two parts, 401 and 895, that added together give a 4-th power (1296 = 6⁴).

The spelling of 401895 in words is "four hundred one thousand, eight hundred ninety-five".