401145 has 16 divisors (see below), whose sum is σ = 656640. Its totient is φ = 209024.

The previous prime is 401119. The next prime is 401161. The reversal of 401145 is 541104.

401145 = 17² + 18² + ... + 106².

It is a cyclic number.

It is not a de Polignac number, because 401145 - 2⁵ = 401113 is a prime.

It is a super-2 number, since 2×401145² = 321834622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

401145 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421 + ... + 989.

It is an arithmetic number, because the mean of its divisors is an integer number (41040).

2⁴⁰¹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

401145 is a deficient number, since it is larger than the sum of its proper divisors (255495).

401145 is a wasteful number, since it uses less digits than its factorization.

401145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 401145 is about 633.3600871542. The cubic root of 401145 is about 73.7508665990.

Adding to 401145 its reverse (541104), we get a palindrome (942249).

The spelling of 401145 in words is "four hundred one thousand, one hundred forty-five".