1165403142 has 48 divisors (see below), whose sum is σ = 2678017680. Its totient is φ = 365008896.

The previous prime is 1165403137. The next prime is 1165403149. The reversal of 1165403142 is 2413045611.

It is a happy number.

1165403142 is a `hidden beast` number, since 1 + 1 + 654 + 0 + 3 + 1 + 4 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165403149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203109 + ... + 208767.

It is an arithmetic number, because the mean of its divisors is an integer number (55792035).

Almost surely, 2^1165403142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165403142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339008840).

1165403142 is an abundant number, since it is smaller than the sum of its proper divisors (1512614538).

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

1165403142 is a wasteful number, since it uses less digits than its factorization.

1165403142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357 (or 6354 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1165403142 is about 34138.0014353506. The cubic root of 1165403142 is about 1052.3464206074.

Adding to 1165403142 its reverse (2413045611), we get a palindrome (3578448753).

The spelling of 1165403142 in words is "one billion, one hundred sixty-five million, four hundred three thousand, one hundred forty-two".