1165315420 has 48 divisors (see below), whose sum is σ = 2529789696. Its totient is φ = 450432000.

The previous prime is 1165315369. The next prime is 1165315421. The reversal of 1165315420 is 245135611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165315421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843130 + ... + 844510.

It is an arithmetic number, because the mean of its divisors is an integer number (52703952).

Almost surely, 2^1165315420 is an apocalyptic number.

1165315420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165315420 is an abundant number, since it is smaller than the sum of its proper divisors (1364474276).

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

1165315420 is a wasteful number, since it uses less digits than its factorization.

1165315420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782 (or 2780 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1165315420 is about 34136.7165966500. The cubic root of 1165315420 is about 1052.3200159394.

The spelling of 1165315420 in words is "one billion, one hundred sixty-five million, three hundred fifteen thousand, four hundred twenty".