1205424740 has 24 divisors (see below), whose sum is σ = 2726115000. Its totient is φ = 445079808.

The previous prime is 1205424713. The next prime is 1205424743. The reversal of 1205424740 is 474245021.

It can be written as a sum of positive squares in 4 ways, for example, as 46566976 + 1158857764 = 6824^2 + 34042^2 .

It is not an unprimeable number, because it can be changed into a prime (1205424743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2317865 + ... + 2318384.

It is an arithmetic number, because the mean of its divisors is an integer number (113588125).

Almost surely, 2^1205424740 is an apocalyptic number.

1205424740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205424740 is an abundant number, since it is smaller than the sum of its proper divisors (1520690260).

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

1205424740 is a wasteful number, since it uses less digits than its factorization.

1205424740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636271 (or 4636269 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 1205424740 is about 34719.2272379441. The cubic root of 1205424740 is about 1064.2574529636.

Adding to 1205424740 its reverse (474245021), we get a palindrome (1679669761).

The spelling of 1205424740 in words is "one billion, two hundred five million, four hundred twenty-four thousand, seven hundred forty".