1248745 has 4 divisors (see below), whose sum is σ = 1498500. Its totient is φ = 998992.

The previous prime is 1248721. The next prime is 1248757. The reversal of 1248745 is 5478421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5478421 = 13 ⋅421417.

It can be written as a sum of positive squares in 2 ways, for example, as 274576 + 974169 = 524^2 + 987^2 .

It is a cyclic number.

It is not a de Polignac number, because 1248745 - 2¹¹ = 1246697 is a prime.

1248745 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124870 + ... + 124879.

It is an arithmetic number, because the mean of its divisors is an integer number (374625).

2^1248745 is an apocalyptic number.

It is an amenable number.

1248745 is a deficient number, since it is larger than the sum of its proper divisors (249755).

1248745 is an equidigital number, since it uses as much as digits as its factorization.

1248745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249754.

The product of its digits is 8960, while the sum is 31.

The square root of 1248745 is about 1117.4725947423. The cubic root of 1248745 is about 107.6856715560.

The spelling of 1248745 in words is "one million, two hundred forty-eight thousand, seven hundred forty-five".