1013861205 has 120 divisors (see below), whose sum is σ = 2161133568. Its totient is φ = 453200832.

The previous prime is 1013861179. The next prime is 1013861209. The reversal of 1013861205 is 5021683101.

1013861205 is a `hidden beast` number, since 10 + 1 + 38 + 612 + 0 + 5 = 666.

It is not a de Polignac number, because 1013861205 - 2⁷ = 1013861077 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013861209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 932172 + ... + 933258.

Almost surely, 2^1013861205 is an apocalyptic number.

1013861205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1013861205 is an abundant number, since it is smaller than the sum of its proper divisors (1147272363).

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

1013861205 is a wasteful number, since it uses less digits than its factorization.

1013861205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1013861205 is about 31841.1872423124. The cubic root of 1013861205 is about 1004.5992164460.

The spelling of 1013861205 in words is "one billion, thirteen million, eight hundred sixty-one thousand, two hundred five".