1205102145 has 32 divisors (see below), whose sum is σ = 2081181312. Its totient is φ = 591939072.

The previous prime is 1205102141. The next prime is 1205102167. The reversal of 1205102145 is 5412015021.

It is not a de Polignac number, because 1205102145 - 2² = 1205102141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1205102141) 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, 82354 + ... + 95876.

It is an arithmetic number, because the mean of its divisors is an integer number (65036916).

Almost surely, 2^1205102145 is an apocalyptic number.

1205102145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1205102145 is a deficient number, since it is larger than the sum of its proper divisors (876079167).

1205102145 is a wasteful number, since it uses less digits than its factorization.

1205102145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14001.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1205102145 is about 34714.5811583548. The cubic root of 1205102145 is about 1064.1625058596.

Adding to 1205102145 its reverse (5412015021), we get a palindrome (6617117166).

The spelling of 1205102145 in words is "one billion, two hundred five million, one hundred two thousand, one hundred forty-five".