1155438453 has 8 divisors (see below), whose sum is σ = 1659091168. Its totient is φ = 711039024.

The previous prime is 1155438413. The next prime is 1155438457. The reversal of 1155438453 is 3548345511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155438453 - 2¹⁷ = 1155307381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 29626627 = 1155438453 / (1 + 1 + 5 + 5 + 4 + 3 + 8 + 4 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155438457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14813275 + ... + 14813352.

It is an arithmetic number, because the mean of its divisors is an integer number (207386396).

Almost surely, 2^1155438453 is an apocalyptic number.

1155438453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1155438453 is a deficient number, since it is larger than the sum of its proper divisors (503652715).

1155438453 is a wasteful number, since it uses less digits than its factorization.

1155438453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29626643.

The product of its digits is 144000, while the sum is 39.

The square root of 1155438453 is about 33991.7409527667. The cubic root of 1155438453 is about 1049.3384958089.

The spelling of 1155438453 in words is "one billion, one hundred fifty-five million, four hundred thirty-eight thousand, four hundred fifty-three".