1154403253 has 4 divisors (see below), whose sum is σ = 1154489760. Its totient is φ = 1154316748.

The previous prime is 1154403251. The next prime is 1154403269. The reversal of 1154403253 is 3523044511.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3523044511 = 7 ⋅503292073.

It is a cyclic number.

It is not a de Polignac number, because 1154403253 - 2¹ = 1154403251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154403251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18523 + ... + 51496.

It is an arithmetic number, because the mean of its divisors is an integer number (288622440).

Almost surely, 2^1154403253 is an apocalyptic number.

It is an amenable number.

1154403253 is a deficient number, since it is larger than the sum of its proper divisors (86507).

1154403253 is an equidigital number, since it uses as much as digits as its factorization.

1154403253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86506.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1154403253 is about 33976.5103122731. The cubic root of 1154403253 is about 1049.0250217965.

Adding to 1154403253 its reverse (3523044511), we get a palindrome (4677447764).

The spelling of 1154403253 in words is "one billion, one hundred fifty-four million, four hundred three thousand, two hundred fifty-three".