1205425431 has 18 divisors (see below), whose sum is σ = 2025443472. Its totient is φ = 688814280.

The previous prime is 1205425393. The next prime is 1205425457. The reversal of 1205425431 is 1345245021.

1205425431 is a `hidden beast` number, since 1 + 205 + 4 + 25 + 431 = 666.

It is not a de Polignac number, because 1205425431 - 2⁶ = 1205425367 is a prime.

It is a super-2 number, since 2×1205425431² = 2906100939403071522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1205425395 and 1205425404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205425631) 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 in 17 ways as a sum of consecutive naturals, for example, 1366255 + ... + 1367136.

Almost surely, 2^1205425431 is an apocalyptic number.

1205425431 is a deficient number, since it is larger than the sum of its proper divisors (820018041).

1205425431 is a wasteful number, since it uses less digits than its factorization.

1205425431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733411 (or 2733401 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1205425431 is about 34719.2371892010. The cubic root of 1205425431 is about 1064.2576563225.

The spelling of 1205425431 in words is "one billion, two hundred five million, four hundred twenty-five thousand, four hundred thirty-one".