1071978 has 16 divisors (see below), whose sum is σ = 2185056. Its totient is φ = 350480.

The previous prime is 1071977. The next prime is 1071979. The reversal of 1071978 is 8791701.

It is an interprime number because it is at equal distance from previous prime (1071977) and next prime (1071979).

It is a super-2 number, since 2×1071978² = 2298273664968, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1071977) 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, 1368 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (136566).

2^1071978 is an apocalyptic number.

1071978 is an abundant number, since it is smaller than the sum of its proper divisors (1113078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1071978 is a wasteful number, since it uses less digits than its factorization.

1071978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3429.

The product of its (nonzero) digits is 3528, while the sum is 33.

The square root of 1071978 is about 1035.3637042122. The cubic root of 1071978 is about 102.3438988149.

The spelling of 1071978 in words is "one million, seventy-one thousand, nine hundred seventy-eight".