1206345431 has 4 divisors (see below), whose sum is σ = 1206475200. Its totient is φ = 1206215664.

The previous prime is 1206345421. The next prime is 1206345463. The reversal of 1206345431 is 1345436021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1206345431 is a prime.

It is a super-2 number, since 2×1206345431² = 2910538597789151522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1206345394 and 1206345403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206345421) 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, 49766 + ... + 69923.

It is an arithmetic number, because the mean of its divisors is an integer number (301618800).

Almost surely, 2^1206345431 is an apocalyptic number.

1206345431 is a deficient number, since it is larger than the sum of its proper divisors (129769).

1206345431 is a wasteful number, since it uses less digits than its factorization.

1206345431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129768.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1206345431 is about 34732.4838011911. The cubic root of 1206345431 is about 1064.5283403017.

The spelling of 1206345431 in words is "one billion, two hundred six million, three hundred forty-five thousand, four hundred thirty-one".