1205275140 has 72 divisors (see below), whose sum is σ = 3791424000. Its totient is φ = 321405408.

The previous prime is 1205275139. The next prime is 1205275151. The reversal of 1205275140 is 415725021.

1205275140 is a `hidden beast` number, since 120 + 5 + 27 + 514 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119140 + ... + 128859.

Almost surely, 2^1205275140 is an apocalyptic number.

1205275140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205275140 is an abundant number, since it is smaller than the sum of its proper divisors (2586148860).

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

1205275140 is a wasteful number, since it uses less digits than its factorization.

1205275140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248023 (or 248009 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 1205275140 is about 34717.0727452647. The cubic root of 1205275140 is about 1064.2134243606.

The spelling of 1205275140 in words is "one billion, two hundred five million, two hundred seventy-five thousand, one hundred forty".