1248388129 has 8 divisors (see below), whose sum is σ = 1273297320. Its totient is φ = 1223529216.

The previous prime is 1248388087. The next prime is 1248388133. The reversal of 1248388129 is 9218838421.

It can be written as a sum of positive squares in 4 ways, for example, as 687645729 + 560742400 = 26223^2 + 23680^2 .

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 1248388129 - 2¹⁷ = 1248257057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248388159) 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, 39727 + ... + 63835.

It is an arithmetic number, because the mean of its divisors is an integer number (159162165).

Almost surely, 2^1248388129 is an apocalyptic number.

It is an amenable number.

1248388129 is a deficient number, since it is larger than the sum of its proper divisors (24909191).

1248388129 is an equidigital number, since it uses as much as digits as its factorization.

1248388129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25139.

The product of its digits is 221184, while the sum is 46.

The square root of 1248388129 is about 35332.5364076795. The cubic root of 1248388129 is about 1076.7541230780.

The spelling of 1248388129 in words is "one billion, two hundred forty-eight million, three hundred eighty-eight thousand, one hundred twenty-nine".