1245535045 has 4 divisors (see below), whose sum is σ = 1494642060. Its totient is φ = 996428032.

The previous prime is 1245535003. The next prime is 1245535051. The reversal of 1245535045 is 5405355421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5405355421 = 2029 ⋅2664049.

It can be written as a sum of positive squares in 2 ways, for example, as 288932004 + 956603041 = 16998^2 + 30929^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245535045 - 2²⁹ = 708664133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1245535045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124553500 + ... + 124553509.

It is an arithmetic number, because the mean of its divisors is an integer number (373660515).

Almost surely, 2^1245535045 is an apocalyptic number.

It is an amenable number.

1245535045 is a deficient number, since it is larger than the sum of its proper divisors (249107015).

1245535045 is an equidigital number, since it uses as much as digits as its factorization.

1245535045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249107014.

The product of its (nonzero) digits is 60000, while the sum is 34.

The square root of 1245535045 is about 35292.1385722090. The cubic root of 1245535045 is about 1075.9332209930.

The spelling of 1245535045 in words is "one billion, two hundred forty-five million, five hundred thirty-five thousand, forty-five".