1375881 has 8 divisors (see below), whose sum is σ = 1975680. Its totient is φ = 846672.

The previous prime is 1375879. The next prime is 1375901. The reversal of 1375881 is 1885731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1375881 - 2¹ = 1375879 is a prime.

It is a super-2 number, since 2×1375881² = 3786097052322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

1375881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1375481) 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, 17601 + ... + 17678.

It is an arithmetic number, because the mean of its divisors is an integer number (246960).

2^1375881 is an apocalyptic number.

It is an amenable number.

1375881 is a deficient number, since it is larger than the sum of its proper divisors (599799).

1375881 is a wasteful number, since it uses less digits than its factorization.

1375881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35295.

The product of its digits is 6720, while the sum is 33.

The square root of 1375881 is about 1172.9795394635. The cubic root of 1375881 is about 111.2227488696. Note that the first 3 decimals are identical.

The spelling of 1375881 in words is "one million, three hundred seventy-five thousand, eight hundred eighty-one".