1154728651 has 4 divisors (see below), whose sum is σ = 1154830600. Its totient is φ = 1154626704.

The previous prime is 1154728637. The next prime is 1154728697. The reversal of 1154728651 is 1568274511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1154728651 - 2¹¹ = 1154726603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1154728151) 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, 31506 + ... + 57463.

It is an arithmetic number, because the mean of its divisors is an integer number (288707650).

Almost surely, 2^1154728651 is an apocalyptic number.

1154728651 is a deficient number, since it is larger than the sum of its proper divisors (101949).

1154728651 is an equidigital number, since it uses as much as digits as its factorization.

1154728651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101948.

The product of its digits is 67200, while the sum is 40.

The square root of 1154728651 is about 33981.2985478778. The cubic root of 1154728651 is about 1049.1235773562.

The spelling of 1154728651 in words is "one billion, one hundred fifty-four million, seven hundred twenty-eight thousand, six hundred fifty-one".