1205440453 has 8 divisors (see below), whose sum is σ = 1378660608. Its totient is φ = 1032473904.

The previous prime is 1205440451. The next prime is 1205440469. The reversal of 1205440453 is 3540445021.

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

It is not a de Polignac number, because 1205440453 - 2¹ = 1205440451 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 (1205440451) 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, 53101 + ... + 72322.

It is an arithmetic number, because the mean of its divisors is an integer number (172332576).

Almost surely, 2^1205440453 is an apocalyptic number.

It is an amenable number.

1205440453 is a deficient number, since it is larger than the sum of its proper divisors (173220155).

1205440453 is a wasteful number, since it uses less digits than its factorization.

1205440453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126803.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1205440453 is about 34719.4535239252. The cubic root of 1205440453 is about 1064.2620772270.

Adding to 1205440453 its reverse (3540445021), we get a palindrome (4745885474).

The spelling of 1205440453 in words is "one billion, two hundred five million, four hundred forty thousand, four hundred fifty-three".