405149 has 4 divisors (see below), whose sum is σ = 411264. Its totient is φ = 399036.

The previous prime is 405143. The next prime is 405157. The reversal of 405149 is 941504.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405149 - 2¹² = 401053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2957 + ... + 3090.

It is an arithmetic number, because the mean of its divisors is an integer number (102816).

2⁴⁰⁵¹⁴⁹ is an apocalyptic number.

It is an amenable number.

405149 is a deficient number, since it is larger than the sum of its proper divisors (6115).

405149 is an equidigital number, since it uses as much as digits as its factorization.

405149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6114.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 405149 is about 636.5131577587. The cubic root of 405149 is about 73.9954343421.

The spelling of 405149 in words is "four hundred five thousand, one hundred forty-nine".