1205101040 has 80 divisors (see below), whose sum is σ = 3291726816. Its totient is φ = 404505600.

The previous prime is 1205101039. The next prime is 1205101067. The reversal of 1205101040 is 401015021.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41231 + ... + 64110.

Almost surely, 2^1205101040 is an apocalyptic number.

1205101040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205101040 is an abundant number, since it is smaller than the sum of its proper divisors (2086625776).

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

1205101040 is a wasteful number, since it uses less digits than its factorization.

1205101040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105378 (or 105372 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1205101040 is about 34714.5652428487. The cubic root of 1205101040 is about 1064.1621806036.

Adding to 1205101040 its reverse (401015021), we get a palindrome (1606116061).

The spelling of 1205101040 in words is "one billion, two hundred five million, one hundred one thousand, forty".