1205691042 has 8 divisors (see below), whose sum is σ = 2411382096. Its totient is φ = 401897012.

The previous prime is 1205691041. The next prime is 1205691049. The reversal of 1205691042 is 2401965021.

It is a sphenic number, since it is the product of 3 distinct primes.

1205691042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1205691041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100474248 + ... + 100474259.

It is an arithmetic number, because the mean of its divisors is an integer number (301422762).

Almost surely, 2^1205691042 is an apocalyptic number.

1205691042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1205691042 is a wasteful number, since it uses less digits than its factorization.

1205691042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200948512.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1205691042 is about 34723.0621057533. The cubic root of 1205691042 is about 1064.3358189842.

The spelling of 1205691042 in words is "one billion, two hundred five million, six hundred ninety-one thousand, forty-two".