1205250240 has 112 divisors (see below), whose sum is σ = 3950208000. Its totient is φ = 311024640.

The previous prime is 1205250229. The next prime is 1205250253. The reversal of 1205250240 is 420525021.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9511 + ... + 50009.

Almost surely, 2^1205250240 is an apocalyptic number.

1205250240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1205250240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1975104000).

1205250240 is an abundant number, since it is smaller than the sum of its proper divisors (2744957760).

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

1205250240 is a wasteful number, since it uses less digits than its factorization.

1205250240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40550 (or 40540 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1205250240 is about 34716.7141302284. The cubic root of 1205250240 is about 1064.2060957167.

Adding to 1205250240 its reverse (420525021), we get a palindrome (1625775261).

The spelling of 1205250240 in words is "one billion, two hundred five million, two hundred fifty thousand, two hundred forty".