1244342545 has 4 divisors (see below), whose sum is σ = 1493211060. Its totient is φ = 995474032.

The previous prime is 1244342501. The next prime is 1244342581. The reversal of 1244342545 is 5452434421.

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 340919296 + 903423249 = 18464^2 + 30057^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244342545 - 2⁷ = 1244342417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1244342545.

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, 124434250 + ... + 124434259.

It is an arithmetic number, because the mean of its divisors is an integer number (373302765).

Almost surely, 2^1244342545 is an apocalyptic number.

It is an amenable number.

1244342545 is a deficient number, since it is larger than the sum of its proper divisors (248868515).

1244342545 is an equidigital number, since it uses as much as digits as its factorization.

1244342545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248868514.

The product of its digits is 76800, while the sum is 34.

The square root of 1244342545 is about 35275.2398290926. The cubic root of 1244342545 is about 1075.5897380693.

Adding to 1244342545 its reverse (5452434421), we get a palindrome (6696776966).

The spelling of 1244342545 in words is "one billion, two hundred forty-four million, three hundred forty-two thousand, five hundred forty-five".