1115452121 has 16 divisors (see below), whose sum is σ = 1331088000. Its totient is φ = 933854544.

The previous prime is 1115452111. The next prime is 1115452147. The reversal of 1115452121 is 1212545111.

It is a happy number.

It is not a de Polignac number, because 1115452121 - 2²² = 1111257817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115452111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23066 + ... + 52563.

It is an arithmetic number, because the mean of its divisors is an integer number (83193000).

Almost surely, 2^1115452121 is an apocalyptic number.

It is an amenable number.

1115452121 is a deficient number, since it is larger than the sum of its proper divisors (215635879).

1115452121 is an frugal number, since it uses more digits than its factorization.

1115452121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75693 (or 75679 counting only the distinct ones).

The product of its digits is 400, while the sum is 23.

The square root of 1115452121 is about 33398.3850058652. The cubic root of 1115452121 is about 1037.0912685428.

Adding to 1115452121 its reverse (1212545111), we get a palindrome (2327997232).

The spelling of 1115452121 in words is "one billion, one hundred fifteen million, four hundred fifty-two thousand, one hundred twenty-one".