1205424431 has 2 divisors, whose sum is σ = 1205424432. Its totient is φ = 1205424430.

The previous prime is 1205424419. The next prime is 1205424497. The reversal of 1205424431 is 1344245021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1205424431 - 2²² = 1201230127 is a prime.

It is a super-2 number, since 2×1205424431² = 2906096117703347522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1205424431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205424131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602712215 + 602712216.

It is an arithmetic number, because the mean of its divisors is an integer number (602712216).

Almost surely, 2^1205424431 is an apocalyptic number.

1205424431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205424431 is an equidigital number, since it uses as much as digits as its factorization.

1205424431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1205424431 is about 34719.2227879600. Note that the first 3 decimals coincide. The cubic root of 1205424431 is about 1064.2573620259.

Adding to 1205424431 its reverse (1344245021), we get a palindrome (2549669452).

The spelling of 1205424431 in words is "one billion, two hundred five million, four hundred twenty-four thousand, four hundred thirty-one".