1145116621 has 4 divisors (see below), whose sum is σ = 1249218144. Its totient is φ = 1041015100.

The previous prime is 1145116619. The next prime is 1145116627. The reversal of 1145116621 is 1266115411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1145116621 - 2¹ = 1145116619 is a prime.

It is a super-2 number, since 2×1145116621² = 2622584151380915282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145116621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145116627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52050745 + ... + 52050766.

It is an arithmetic number, because the mean of its divisors is an integer number (312304536).

Almost surely, 2^1145116621 is an apocalyptic number.

1145116621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1145116621 is a deficient number, since it is larger than the sum of its proper divisors (104101523).

1145116621 is a wasteful number, since it uses less digits than its factorization.

1145116621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104101522.

The product of its digits is 1440, while the sum is 28.

The square root of 1145116621 is about 33839.5718205772. The cubic root of 1145116621 is about 1046.2044736857.

The spelling of 1145116621 in words is "one billion, one hundred forty-five million, one hundred sixteen thousand, six hundred twenty-one".