1205409164 has 6 divisors (see below), whose sum is σ = 2109466044. Its totient is φ = 602704580.

The previous prime is 1205409113. The next prime is 1205409169. The reversal of 1205409164 is 4619045021.

It is a super-2 number, since 2×1205409164² = 2906022505310357792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1205409164.

It is not an unprimeable number, because it can be changed into a prime (1205409169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150676142 + ... + 150676149.

It is an arithmetic number, because the mean of its divisors is an integer number (351577674).

Almost surely, 2^1205409164 is an apocalyptic number.

It is an amenable number.

1205409164 is a deficient number, since it is larger than the sum of its proper divisors (904056880).

1205409164 is a wasteful number, since it uses less digits than its factorization.

1205409164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301352295 (or 301352293 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1205409164 is about 34719.0029234712. The cubic root of 1205409164 is about 1064.2528689789.

The spelling of 1205409164 in words is "one billion, two hundred five million, four hundred nine thousand, one hundred sixty-four".