102440453 has 4 divisors (see below), whose sum is σ = 108466380. Its totient is φ = 96414528.

The previous prime is 102440431. The next prime is 102440473. The reversal of 102440453 is 354044201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354044201 = 7 ⋅50577743.

It can be written as a sum of positive squares in 2 ways, for example, as 93064609 + 9375844 = 9647^2 + 3062^2 .

It is a cyclic number.

It is not a de Polignac number, because 102440453 - 2¹⁶ = 102374917 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 (102440473) 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, 3012938 + ... + 3012971.

It is an arithmetic number, because the mean of its divisors is an integer number (27116595).

Almost surely, 2^102440453 is an apocalyptic number.

It is an amenable number.

102440453 is a deficient number, since it is larger than the sum of its proper divisors (6025927).

102440453 is an equidigital number, since it uses as much as digits as its factorization.

102440453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6025926.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 102440453 is about 10121.2871217054. The cubic root of 102440453 is about 467.9044369249.

Adding to 102440453 its reverse (354044201), we get a palindrome (456484654).

The spelling of 102440453 in words is "one hundred two million, four hundred forty thousand, four hundred fifty-three".