1244023121 has 16 divisors (see below), whose sum is σ = 1406885760. Its totient is φ = 1089621120.

The previous prime is 1244023097. The next prime is 1244023133. The reversal of 1244023121 is 1213204421.

It is a cyclic number.

It is not a de Polignac number, because 1244023121 - 2¹⁴ = 1244006737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1244023093 and 1244023102.

It is not an unprimeable number, because it can be changed into a prime (1244023171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156581 + ... + 164333.

It is an arithmetic number, because the mean of its divisors is an integer number (87930360).

Almost surely, 2^1244023121 is an apocalyptic number.

1244023121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1244023121 is a deficient number, since it is larger than the sum of its proper divisors (162862639).

1244023121 is a wasteful number, since it uses less digits than its factorization.

1244023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8296.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1244023121 is about 35270.7119434808. The cubic root of 1244023121 is about 1075.4976951989.

Adding to 1244023121 its reverse (1213204421), we get a palindrome (2457227542).

The spelling of 1244023121 in words is "one billion, two hundred forty-four million, twenty-three thousand, one hundred twenty-one".