1205445345 has 32 divisors (see below), whose sum is σ = 2080243200. Its totient is φ = 592545024.

The previous prime is 1205445337. The next prime is 1205445347. The reversal of 1205445345 is 5435445021.

It is not a de Polignac number, because 1205445345 - 2³ = 1205445337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1205445347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133896 + ... + 142614.

It is an arithmetic number, because the mean of its divisors is an integer number (65007600).

Almost surely, 2^1205445345 is an apocalyptic number.

1205445345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1205445345 is a deficient number, since it is larger than the sum of its proper divisors (874797855).

1205445345 is a wasteful number, since it uses less digits than its factorization.

1205445345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9449.

The product of its (nonzero) digits is 48000, while the sum is 33.

The square root of 1205445345 is about 34719.5239742713. The cubic root of 1205445345 is about 1064.2635169118.

The spelling of 1205445345 in words is "one billion, two hundred five million, four hundred forty-five thousand, three hundred forty-five".