1206503125 has 24 divisors (see below), whose sum is σ = 1515418632. Its totient is φ = 960480000.

The previous prime is 1206503119. The next prime is 1206503149. The reversal of 1206503125 is 5213056021.

It can be written as a sum of positive squares in 12 ways, for example, as 1152127249 + 54375876 = 33943^2 + 7374^2 .

It is not a de Polignac number, because 1206503125 - 2⁵ = 1206503093 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 a self number, because there is not a number n which added to its sum of digits gives 1206503125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 727297 + ... + 728953.

It is an arithmetic number, because the mean of its divisors is an integer number (63142443).

Almost surely, 2^1206503125 is an apocalyptic number.

It is an amenable number.

1206503125 is a deficient number, since it is larger than the sum of its proper divisors (308915507).

1206503125 is an frugal number, since it uses more digits than its factorization.

1206503125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915 (or 1895 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1206503125 is about 34734.7538497108. The cubic root of 1206503125 is about 1064.5747234834.

Adding to 1206503125 its reverse (5213056021), we get a palindrome (6419559146).

The spelling of 1206503125 in words is "one billion, two hundred six million, five hundred three thousand, one hundred twenty-five".