1145466721 has 16 divisors (see below), whose sum is σ = 1331630080. Its totient is φ = 965079360.

The previous prime is 1145466719. The next prime is 1145466787. The reversal of 1145466721 is 1276645411.

It is not a de Polignac number, because 1145466721 - 2¹ = 1145466719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145466221) 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, 90991 + ... + 102811.

It is an arithmetic number, because the mean of its divisors is an integer number (83226880).

Almost surely, 2^1145466721 is an apocalyptic number.

It is an amenable number.

1145466721 is a deficient number, since it is larger than the sum of its proper divisors (186163359).

1145466721 is a wasteful number, since it uses less digits than its factorization.

1145466721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12064.

The product of its digits is 40320, while the sum is 37.

The square root of 1145466721 is about 33844.7443630470. The cubic root of 1145466721 is about 1046.3110825842.

The spelling of 1145466721 in words is "one billion, one hundred forty-five million, four hundred sixty-six thousand, seven hundred twenty-one".