1204205140 has 12 divisors (see below), whose sum is σ = 2528830836. Its totient is φ = 481682048.

The previous prime is 1204205117. The next prime is 1204205141. The reversal of 1204205140 is 415024021.

It can be written as a sum of positive squares in 2 ways, for example, as 715883536 + 488321604 = 26756^2 + 22098^2 .

It is a super-2 number, since 2×1204205140² = 2900220038404839200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204205141) 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, 30105109 + ... + 30105148.

It is an arithmetic number, because the mean of its divisors is an integer number (210735903).

Almost surely, 2^1204205140 is an apocalyptic number.

1204205140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1204205140 is an abundant number, since it is smaller than the sum of its proper divisors (1324625696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1204205140 is a wasteful number, since it uses less digits than its factorization.

1204205140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60210266 (or 60210264 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1204205140 is about 34701.6590381497. The cubic root of 1204205140 is about 1063.8984076310.

Adding to 1204205140 its reverse (415024021), we get a palindrome (1619229161).

The spelling of 1204205140 in words is "one billion, two hundred four million, two hundred five thousand, one hundred forty".