1209461725 has 12 divisors (see below), whose sum is σ = 1500362676. Its totient is φ = 967162880.

The previous prime is 1209461723. The next prime is 1209461779. The reversal of 1209461725 is 5271649021.

It can be written as a sum of positive squares in 6 ways, for example, as 57062916 + 1152398809 = 7554^2 + 33947^2 .

It is not a de Polignac number, because 1209461725 - 2¹ = 1209461723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209461723) 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 11 ways as a sum of consecutive naturals, for example, 60039 + ... + 77611.

It is an arithmetic number, because the mean of its divisors is an integer number (125030223).

Almost surely, 2^1209461725 is an apocalyptic number.

It is an amenable number.

1209461725 is a deficient number, since it is larger than the sum of its proper divisors (290900951).

1209461725 is a wasteful number, since it uses less digits than its factorization.

1209461725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20336 (or 20331 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1209461725 is about 34777.3162420564. The cubic root of 1209461725 is about 1065.4442003701. Note that the first 3 decimals are identical.

The spelling of 1209461725 in words is "one billion, two hundred nine million, four hundred sixty-one thousand, seven hundred twenty-five".