1244172137 has 8 divisors (see below), whose sum is σ = 1350429696. Its totient is φ = 1139422032.

The previous prime is 1244172089. The next prime is 1244172187. The reversal of 1244172137 is 7312714421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1244172137 - 2²² = 1239977833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244172187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375143 + ... + 378444.

It is an arithmetic number, because the mean of its divisors is an integer number (168803712).

Almost surely, 2^1244172137 is an apocalyptic number.

It is an amenable number.

1244172137 is a deficient number, since it is larger than the sum of its proper divisors (106257559).

1244172137 is a wasteful number, since it uses less digits than its factorization.

1244172137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753727.

The product of its digits is 9408, while the sum is 32.

The square root of 1244172137 is about 35272.8243411270. The cubic root of 1244172137 is about 1075.5406365138.

Adding to 1244172137 its reverse (7312714421), we get a palindrome (8556886558).

The spelling of 1244172137 in words is "one billion, two hundred forty-four million, one hundred seventy-two thousand, one hundred thirty-seven".