1375866 has 48 divisors (see below), whose sum is σ = 3276000. Its totient is φ = 431568.

The previous prime is 1375853. The next prime is 1375877. The reversal of 1375866 is 6685731.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1375866.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9160 + ... + 9308.

It is an arithmetic number, because the mean of its divisors is an integer number (68250).

2^1375866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1375866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1638000).

1375866 is an abundant number, since it is smaller than the sum of its proper divisors (1900134).

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

1375866 is a wasteful number, since it uses less digits than its factorization.

1375866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 173 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1375866 is about 1172.9731454726. The cubic root of 1375866 is about 111.2223446808. Note that the first 3 decimals are identical.

It can be divided in two parts, 13758 and 66, that added together give a cube (13824 = 24³).

The spelling of 1375866 in words is "one million, three hundred seventy-five thousand, eight hundred sixty-six".