1165143100 has 36 divisors (see below), whose sum is σ = 2758214088. Its totient is φ = 423688000.

The previous prime is 1165143079. The next prime is 1165143101. The reversal of 1165143100 is 13415611.

It is a super-2 number, since 2×1165143100² = 2715116886955220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165143101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 528511 + ... + 530710.

It is an arithmetic number, because the mean of its divisors is an integer number (76617058).

Almost surely, 2^1165143100 is an apocalyptic number.

1165143100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165143100 is an abundant number, since it is smaller than the sum of its proper divisors (1593070988).

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

1165143100 is a wasteful number, since it uses less digits than its factorization.

1165143100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059246 (or 1059239 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1165143100 is about 34134.1925347590. The cubic root of 1165143100 is about 1052.2681430813.

Adding to 1165143100 its reverse (13415611), we get a palindrome (1178558711).

The spelling of 1165143100 in words is "one billion, one hundred sixty-five million, one hundred forty-three thousand, one hundred".