401289 has 16 divisors (see below), whose sum is σ = 620928. Its totient is φ = 225792.

The previous prime is 401287. The next prime is 401309. The reversal of 401289 is 982104.

It is not a de Polignac number, because 401289 - 2¹ = 401287 is a prime.

It is a super-2 number, since 2×401289² = 322065723042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1939 + ... + 2135.

It is an arithmetic number, because the mean of its divisors is an integer number (38808).

2⁴⁰¹²⁸⁹ is an apocalyptic number.

It is an amenable number.

401289 is a deficient number, since it is larger than the sum of its proper divisors (219639).

401289 is a wasteful number, since it uses less digits than its factorization.

401289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 401289 is about 633.4737563625. The cubic root of 401289 is about 73.7596903862.

The spelling of 401289 in words is "four hundred one thousand, two hundred eighty-nine".