4205149 has 4 divisors (see below), whose sum is σ = 4528636. Its totient is φ = 3881664.

The previous prime is 4205147. The next prime is 4205153. The reversal of 4205149 is 9415024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1909924 + 2295225 = 1382^2 + 1515^2 .

It is a cyclic number.

It is not a de Polignac number, because 4205149 - 2¹ = 4205147 is a prime.

It is a super-2 number, since 2×4205149² = 35366556224402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4205143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161724 + ... + 161749.

It is an arithmetic number, because the mean of its divisors is an integer number (1132159).

Almost surely, 2^4205149 is an apocalyptic number.

It is an amenable number.

4205149 is a deficient number, since it is larger than the sum of its proper divisors (323487).

4205149 is a wasteful number, since it uses less digits than its factorization.

4205149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323486.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 4205149 is about 2050.6459957779. The cubic root of 4205149 is about 161.4087705669.

The spelling of 4205149 in words is "four million, two hundred five thousand, one hundred forty-nine".