1205411656 has 32 divisors (see below), whose sum is σ = 2421951840. Its totient is φ = 560412928.

The previous prime is 1205411633. The next prime is 1205411671. The reversal of 1205411656 is 6561145021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42106 + ... + 64681.

It is an arithmetic number, because the mean of its divisors is an integer number (75685995).

Almost surely, 2^1205411656 is an apocalyptic number.

It is an amenable number.

1205411656 is an abundant number, since it is smaller than the sum of its proper divisors (1216540184).

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

1205411656 is a wasteful number, since it uses less digits than its factorization.

1205411656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106893 (or 106889 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1205411656 is about 34719.0388115800. The cubic root of 1205411656 is about 1064.2536023720.

Adding to 1205411656 its reverse (6561145021), we get a palindrome (7766556677).

The spelling of 1205411656 in words is "one billion, two hundred five million, four hundred eleven thousand, six hundred fifty-six".