1157440453 has 4 divisors (see below), whose sum is σ = 1246474348. Its totient is φ = 1068406560.

The previous prime is 1157440441. The next prime is 1157440457. The reversal of 1157440453 is 3540447511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3540447511 = 709 ⋅4993579.

It can be written as a sum of positive squares in 2 ways, for example, as 642014244 + 515426209 = 25338^2 + 22703^2 .

It is not a de Polignac number, because 1157440453 - 2¹⁷ = 1157309381 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 (1157440457) 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, 44516928 + ... + 44516953.

It is an arithmetic number, because the mean of its divisors is an integer number (311618587).

Almost surely, 2^1157440453 is an apocalyptic number.

1157440453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1157440453 is a deficient number, since it is larger than the sum of its proper divisors (89033895).

1157440453 is an equidigital number, since it uses as much as digits as its factorization.

1157440453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89033894.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 1157440453 is about 34021.1765375626. The cubic root of 1157440453 is about 1049.9442005117.

Adding to 1157440453 its reverse (3540447511), we get a palindrome (4697887964).

The spelling of 1157440453 in words is "one billion, one hundred fifty-seven million, four hundred forty thousand, four hundred fifty-three".