1145242120 has 64 divisors (see below), whose sum is σ = 2814782400. Its totient is φ = 415898880.

The previous prime is 1145242117. The next prime is 1145242123. The reversal of 1145242120 is 212425411.

It is an interprime number because it is at equal distance from previous prime (1145242117) and next prime (1145242123).

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

It is a junction number, because it is equal to n+sod(n) for n = 1145242091 and 1145242100.

It is not an unprimeable number, because it can be changed into a prime (1145242123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486787 + ... + 489133.

It is an arithmetic number, because the mean of its divisors is an integer number (43980975).

Almost surely, 2^1145242120 is an apocalyptic number.

1145242120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145242120 is an abundant number, since it is smaller than the sum of its proper divisors (1669540280).

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

1145242120 is a wasteful number, since it uses less digits than its factorization.

1145242120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478 (or 3474 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1145242120 is about 33841.4260928821. The cubic root of 1145242120 is about 1046.2426918656.

Adding to 1145242120 its reverse (212425411), we get a palindrome (1357667531).

The spelling of 1145242120 in words is "one billion, one hundred forty-five million, two hundred forty-two thousand, one hundred twenty".