1165671420 has 24 divisors (see below), whose sum is σ = 3263880144. Its totient is φ = 310845696.

The previous prime is 1165671389. The next prime is 1165671431. The reversal of 1165671420 is 241765611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9713869 + ... + 9713988.

It is an arithmetic number, because the mean of its divisors is an integer number (135995006).

Almost surely, 2^1165671420 is an apocalyptic number.

1165671420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165671420 is an abundant number, since it is smaller than the sum of its proper divisors (2098208724).

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

1165671420 is a wasteful number, since it uses less digits than its factorization.

1165671420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19427869 (or 19427867 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1165671420 is about 34141.9305253818. The cubic root of 1165671420 is about 1052.4271651217.

The spelling of 1165671420 in words is "one billion, one hundred sixty-five million, six hundred seventy-one thousand, four hundred twenty".