1244551345 has 4 divisors (see below), whose sum is σ = 1493461620. Its totient is φ = 995641072.

The previous prime is 1244551339. The next prime is 1244551361. The reversal of 1244551345 is 5431554421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5431554421 = 257 ⋅21134453.

It can be written as a sum of positive squares in 2 ways, for example, as 396169216 + 848382129 = 19904^2 + 29127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244551345 - 2⁵ = 1244551313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1244551345.

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, 124455130 + ... + 124455139.

It is an arithmetic number, because the mean of its divisors is an integer number (373365405).

Almost surely, 2^1244551345 is an apocalyptic number.

It is an amenable number.

1244551345 is a deficient number, since it is larger than the sum of its proper divisors (248910275).

1244551345 is an equidigital number, since it uses as much as digits as its factorization.

1244551345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248910274.

The product of its digits is 48000, while the sum is 34.

The square root of 1244551345 is about 35278.1992879455. The cubic root of 1244551345 is about 1075.6498958283.

The spelling of 1244551345 in words is "one billion, two hundred forty-four million, five hundred fifty-one thousand, three hundred forty-five".