1244123155 has 32 divisors (see below), whose sum is σ = 1780144128. Its totient is φ = 824102400.

The previous prime is 1244123149. The next prime is 1244123161. The reversal of 1244123155 is 5513214421.

It is an interprime number because it is at equal distance from previous prime (1244123149) and next prime (1244123161).

It is not a de Polignac number, because 1244123155 - 2⁵ = 1244123123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7524 + ... + 50446.

It is an arithmetic number, because the mean of its divisors is an integer number (55629504).

Almost surely, 2^1244123155 is an apocalyptic number.

1244123155 is a deficient number, since it is larger than the sum of its proper divisors (536020973).

1244123155 is a wasteful number, since it uses less digits than its factorization.

1244123155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42987.

The product of its digits is 4800, while the sum is 28.

The square root of 1244123155 is about 35272.1300037296. The cubic root of 1244123155 is about 1075.5265219548.

Adding to 1244123155 its reverse (5513214421), we get a palindrome (6757337576).

The spelling of 1244123155 in words is "one billion, two hundred forty-four million, one hundred twenty-three thousand, one hundred fifty-five".