1306206025 has 12 divisors (see below), whose sum is σ = 1628181504. Its totient is φ = 1039490000.

The previous prime is 1306206007. The next prime is 1306206029. The reversal of 1306206025 is 5206026031.

It is not a de Polignac number, because 1306206025 - 2¹⁹ = 1305681737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306206029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132001 + ... + 141550.

It is an arithmetic number, because the mean of its divisors is an integer number (135681792).

Almost surely, 2^1306206025 is an apocalyptic number.

It is an amenable number.

1306206025 is a deficient number, since it is larger than the sum of its proper divisors (321975479).

1306206025 is a wasteful number, since it uses less digits than its factorization.

1306206025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273752 (or 273747 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1306206025 is about 36141.4723690112. The cubic root of 1306206025 is about 1093.1268476453.

The spelling of 1306206025 in words is "one billion, three hundred six million, two hundred six thousand, twenty-five".