1249792 has 20 divisors (see below), whose sum is σ = 2498166. Its totient is φ = 624640.

The previous prime is 1249757. The next prime is 1249799. The reversal of 1249792 is 2979421.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1218816 + 30976 = 1104^2 + 176^2 .

It is not an unprimeable number, because it can be changed into a prime (1249799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 709 + ... + 1732.

2^1249792 is an apocalyptic number.

It is an amenable number.

1249792 is a deficient number, since it is larger than the sum of its proper divisors (1248374).

1249792 is an frugal number, since it uses more digits than its factorization.

1249792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459 (or 2443 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 1249792 is about 1117.9409644521. The cubic root of 1249792 is about 107.7157592046.

The spelling of 1249792 in words is "one million, two hundred forty-nine thousand, seven hundred ninety-two".