1244557145 has 16 divisors (see below), whose sum is σ = 1614779712. Its totient is φ = 915384000.

The previous prime is 1244557129. The next prime is 1244557157. The reversal of 1244557145 is 5417554421.

It is not a de Polignac number, because 1244557145 - 2⁴ = 1244557129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1244557099 and 1244557108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21827 + ... + 54456.

It is an arithmetic number, because the mean of its divisors is an integer number (100923732).

Almost surely, 2^1244557145 is an apocalyptic number.

It is an amenable number.

1244557145 is a deficient number, since it is larger than the sum of its proper divisors (370222567).

1244557145 is a wasteful number, since it uses less digits than its factorization.

1244557145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76552.

The product of its digits is 112000, while the sum is 38.

The square root of 1244557145 is about 35278.2814915920. The cubic root of 1244557145 is about 1075.6515667811.

The spelling of 1244557145 in words is "one billion, two hundred forty-four million, five hundred fifty-seven thousand, one hundred forty-five".