1205240404 has 6 divisors (see below), whose sum is σ = 2109170714. Its totient is φ = 602620200.

The previous prime is 1205240401. The next prime is 1205240429. The reversal of 1205240404 is 4040425021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 823116100 + 382124304 = 28690^2 + 19548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205240401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150655047 + ... + 150655054.

Almost surely, 2^1205240404 is an apocalyptic number.

It is an amenable number.

1205240404 is a deficient number, since it is larger than the sum of its proper divisors (903930310).

1205240404 is a wasteful number, since it uses less digits than its factorization.

1205240404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301310105 (or 301310103 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1205240404 is about 34716.5724690673. The cubic root of 1205240404 is about 1064.2032007274.

Adding to 1205240404 its reverse (4040425021), we get a palindrome (5245665425).

The spelling of 1205240404 in words is "one billion, two hundred five million, two hundred forty thousand, four hundred four".