1205141240 has 64 divisors (see below), whose sum is σ = 2741506560. Its totient is φ = 476769280.

The previous prime is 1205141233. The next prime is 1205141317. The reversal of 1205141240 is 421415021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent 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, 1779782 + ... + 1780458.

It is an arithmetic number, because the mean of its divisors is an integer number (42836040).

Almost surely, 2^1205141240 is an apocalyptic number.

1205141240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205141240 is an abundant number, since it is smaller than the sum of its proper divisors (1536365320).

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

1205141240 is a wasteful number, since it uses less digits than its factorization.

1205141240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1205141240 is about 34715.1442457035. The cubic root of 1205141240 is about 1064.1740133166.

Adding to 1205141240 its reverse (421415021), we get a palindrome (1626556261).

The spelling of 1205141240 in words is "one billion, two hundred five million, one hundred forty-one thousand, two hundred forty".