1245142445 has 4 divisors (see below), whose sum is σ = 1494170940. Its totient is φ = 996113952.

The previous prime is 1245142411. The next prime is 1245142453. The reversal of 1245142445 is 5442415421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 325658116 + 919484329 = 18046^2 + 30323^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245142445 - 2¹⁶ = 1245076909 is a prime.

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, 124514240 + ... + 124514249.

It is an arithmetic number, because the mean of its divisors is an integer number (373542735).

Almost surely, 2^1245142445 is an apocalyptic number.

It is an amenable number.

1245142445 is a deficient number, since it is larger than the sum of its proper divisors (249028495).

1245142445 is an equidigital number, since it uses as much as digits as its factorization.

1245142445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249028494.

The product of its digits is 25600, while the sum is 32.

The square root of 1245142445 is about 35286.5759886107. The cubic root of 1245142445 is about 1075.8201622787.

Adding to 1245142445 its reverse (5442415421), we get a palindrome (6687557866).

The spelling of 1245142445 in words is "one billion, two hundred forty-five million, one hundred forty-two thousand, four hundred forty-five".