1259978 has 4 divisors (see below), whose sum is σ = 1889970. Its totient is φ = 629988.

The previous prime is 1259977. The next prime is 1259983. The reversal of 1259978 is 8799521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 833569 + 426409 = 913^2 + 653^2 .

It is not an unprimeable number, because it can be changed into a prime (1259977) by changing a digit.

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 as a sum of consecutive naturals, namely, 314993 + ... + 314996.

2^1259978 is an apocalyptic number.

1259978 is a deficient number, since it is larger than the sum of its proper divisors (629992).

1259978 is an equidigital number, since it uses as much as digits as its factorization.

1259978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629991.

The product of its digits is 45360, while the sum is 41.

The square root of 1259978 is about 1122.4874164105. The cubic root of 1259978 is about 108.0076012025.

The spelling of 1259978 in words is "one million, two hundred fifty-nine thousand, nine hundred seventy-eight".