1145121552 has 30 divisors (see below), whose sum is σ = 3204750302. Its totient is φ = 381707136.

The previous prime is 1145121541. The next prime is 1145121557. The reversal of 1145121552 is 2551215411.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 879952896 + 265168656 = 29664^2 + 16284^2 .

It is a super-2 number, since 2×1145121552² = 2622606737709777408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145121557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3975973 + ... + 3976260.

Almost surely, 2^1145121552 is an apocalyptic number.

1145121552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1145121552 is an abundant number, since it is smaller than the sum of its proper divisors (2059628750).

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

1145121552 is a wasteful number, since it uses less digits than its factorization.

1145121552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7952247 (or 7952238 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1145121552 is about 33839.6446789856. The cubic root of 1145121552 is about 1046.2059753746.

Adding to 1145121552 its reverse (2551215411), we get a palindrome (3696336963).

The spelling of 1145121552 in words is "one billion, one hundred forty-five million, one hundred twenty-one thousand, five hundred fifty-two".