1248172042 has 16 divisors (see below), whose sum is σ = 2017362312. Its totient is φ = 575769600.

The previous prime is 1248172033. The next prime is 1248172063. The reversal of 1248172042 is 2402718421.

It can be written as a sum of positive squares in 4 ways, for example, as 1161514561 + 86657481 = 34081^2 + 9309^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1248171995 and 1248172013.

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, 40542 + ... + 64342.

Almost surely, 2^1248172042 is an apocalyptic number.

1248172042 is a deficient number, since it is larger than the sum of its proper divisors (769190270).

1248172042 is a wasteful number, since it uses less digits than its factorization.

1248172042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25833.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 1248172042 is about 35329.4783714676. The cubic root of 1248172042 is about 1076.6919933635.

The spelling of 1248172042 in words is "one billion, two hundred forty-eight million, one hundred seventy-two thousand, forty-two".