1151645123 has 4 divisors (see below), whose sum is σ = 1155895008. Its totient is φ = 1147395240.

The previous prime is 1151645101. The next prime is 1151645147. The reversal of 1151645123 is 3215461511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3215461511 = 1237 ⋅2599403.

It is a cyclic number.

It is not a de Polignac number, because 1151645123 - 2⁸ = 1151644867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151645923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2124536 + ... + 2125077.

It is an arithmetic number, because the mean of its divisors is an integer number (288973752).

Almost surely, 2^1151645123 is an apocalyptic number.

1151645123 is a deficient number, since it is larger than the sum of its proper divisors (4249885).

1151645123 is an equidigital number, since it uses as much as digits as its factorization.

1151645123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249884.

The product of its digits is 3600, while the sum is 29.

The square root of 1151645123 is about 33935.8972623386. The cubic root of 1151645123 is about 1048.1889030122.

The spelling of 1151645123 in words is "one billion, one hundred fifty-one million, six hundred forty-five thousand, one hundred twenty-three".