1145152242 has 80 divisors (see below), whose sum is σ = 2798759040. Its totient is φ = 347843808.

The previous prime is 1145152237. The next prime is 1145152243. The reversal of 1145152242 is 2422515411.

It is a happy number.

It is a super-2 number, since 2×1145152242² = 2622747314715253128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1145152243) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 162933 + ... + 169815.

It is an arithmetic number, because the mean of its divisors is an integer number (34984488).

Almost surely, 2^1145152242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145152242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399379520).

1145152242 is an abundant number, since it is smaller than the sum of its proper divisors (1653606798).

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

1145152242 is a wasteful number, since it uses less digits than its factorization.

1145152242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6989 (or 6980 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1145152242 is about 33840.0981381556. The cubic root of 1145152242 is about 1046.2153216239.

Adding to 1145152242 its reverse (2422515411), we get a palindrome (3567667653).

The spelling of 1145152242 in words is "one billion, one hundred forty-five million, one hundred fifty-two thousand, two hundred forty-two".