1248748145 has 8 divisors (see below), whose sum is σ = 1512246120. Its totient is φ = 989832960.

The previous prime is 1248748139. The next prime is 1248748183. The reversal of 1248748145 is 5418478421.

It can be written as a sum of positive squares in 4 ways, for example, as 240622144 + 1008126001 = 15512^2 + 31751^2 .

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

It is not a de Polignac number, because 1248748145 - 2¹⁴ = 1248731761 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1248748096 and 1248748105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1145096 + ... + 1146185.

It is an arithmetic number, because the mean of its divisors is an integer number (189030765).

Almost surely, 2^1248748145 is an apocalyptic number.

It is an amenable number.

1248748145 is a deficient number, since it is larger than the sum of its proper divisors (263497975).

1248748145 is a wasteful number, since it uses less digits than its factorization.

1248748145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291395.

The product of its digits is 286720, while the sum is 44.

The square root of 1248748145 is about 35337.6307213712. The cubic root of 1248748145 is about 1076.8576195909.

The spelling of 1248748145 in words is "one billion, two hundred forty-eight million, seven hundred forty-eight thousand, one hundred forty-five".