1265978 has 16 divisors (see below), whose sum is σ = 2241024. Its totient is φ = 524880.

The previous prime is 1265977. The next prime is 1265981. The reversal of 1265978 is 8795621.

It is not an unprimeable number, because it can be changed into a prime (1265977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025 + ... + 1892.

It is an arithmetic number, because the mean of its divisors is an integer number (140064).

2^1265978 is an apocalyptic number.

1265978 is a deficient number, since it is larger than the sum of its proper divisors (975046).

1265978 is a wasteful number, since it uses less digits than its factorization.

1265978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957.

The product of its digits is 30240, while the sum is 38.

The square root of 1265978 is about 1125.1568779508. The cubic root of 1265978 is about 108.1787734130.

The spelling of 1265978 in words is "one million, two hundred sixty-five thousand, nine hundred seventy-eight".