1206539725 has 12 divisors (see below), whose sum is σ = 1584116244. Its totient is φ = 908453120.

The previous prime is 1206539717. The next prime is 1206539777. The reversal of 1206539725 is 5279356021.

It can be written as a sum of positive squares in 6 ways, for example, as 43797924 + 1162741801 = 6618^2 + 34099^2 .

It is not a de Polignac number, because 1206539725 - 2³ = 1206539717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1419034 + ... + 1419883.

It is an arithmetic number, because the mean of its divisors is an integer number (132009687).

Almost surely, 2^1206539725 is an apocalyptic number.

It is an amenable number.

1206539725 is a deficient number, since it is larger than the sum of its proper divisors (377576519).

1206539725 is a wasteful number, since it uses less digits than its factorization.

1206539725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838944 (or 2838939 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 1206539725 is about 34735.2806955695. The cubic root of 1206539725 is about 1064.5854882133.

The spelling of 1206539725 in words is "one billion, two hundred six million, five hundred thirty-nine thousand, seven hundred twenty-five".