404020249 has 4 divisors (see below), whose sum is σ = 427786164. Its totient is φ = 380254336.

The previous prime is 404020247. The next prime is 404020271. The reversal of 404020249 is 942020404.

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 305375625 + 98644624 = 17475^2 + 9932^2 .

It is a cyclic number.

It is not a de Polignac number, because 404020249 - 2¹ = 404020247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404020247) 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, 11882932 + ... + 11882965.

It is an arithmetic number, because the mean of its divisors is an integer number (106946541).

Almost surely, 2^404020249 is an apocalyptic number.

It is an amenable number.

404020249 is a deficient number, since it is larger than the sum of its proper divisors (23765915).

404020249 is a wasteful number, since it uses less digits than its factorization.

404020249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23765914.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 404020249 is about 20100.2549486319. The cubic root of 404020249 is about 739.2665297554.

The spelling of 404020249 in words is "four hundred four million, twenty thousand, two hundred forty-nine".