1205431453 has 2 divisors, whose sum is σ = 1205431454. Its totient is φ = 1205431452.

The previous prime is 1205431391. The next prime is 1205431471. The reversal of 1205431453 is 3541345021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 970820964 + 234610489 = 31158^2 + 15317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205431453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205431483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602715726 + 602715727.

It is an arithmetic number, because the mean of its divisors is an integer number (602715727).

Almost surely, 2^1205431453 is an apocalyptic number.

It is an amenable number.

1205431453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205431453 is an equidigital number, since it uses as much as digits as its factorization.

1205431453 is an evil number, because the sum of its binary digits is even.

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

The square root of 1205431453 is about 34719.3239133483. The cubic root of 1205431453 is about 1064.2594285734.

Adding to 1205431453 its reverse (3541345021), we get a palindrome (4746776474).

The spelling of 1205431453 in words is "one billion, two hundred five million, four hundred thirty-one thousand, four hundred fifty-three".