1209234745 has 8 divisors (see below), whose sum is σ = 1458601416. Its totient is φ = 962374656.

The previous prime is 1209234739. The next prime is 1209234749. The reversal of 1209234745 is 5474329021.

It can be written as a sum of positive squares in 4 ways, for example, as 119508624 + 1089726121 = 10932^2 + 33011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1209234745 - 2¹³ = 1209226553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1209234749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625582 + ... + 627511.

It is an arithmetic number, because the mean of its divisors is an integer number (182325177).

Almost surely, 2^1209234745 is an apocalyptic number.

It is an amenable number.

1209234745 is a deficient number, since it is larger than the sum of its proper divisors (249366671).

1209234745 is a wasteful number, since it uses less digits than its factorization.

1209234745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253291.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1209234745 is about 34774.0527548918. The cubic root of 1209234745 is about 1065.3775454691.

The spelling of 1209234745 in words is "one billion, two hundred nine million, two hundred thirty-four thousand, seven hundred forty-five".