1880001 has 6 divisors (see below), whose sum is σ = 2715570. Its totient is φ = 1253328.

The previous prime is 1879967. The next prime is 1880017. The reversal of 1880001 is 1000881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1382976 + 497025 = 1176^2 + 705^2 .

It is not a de Polignac number, because 1880001 - 2⁶ = 1879937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1880201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104436 + ... + 104453.

It is an arithmetic number, because the mean of its divisors is an integer number (452595).

2^1880001 is an apocalyptic number.

It is an amenable number.

1880001 is a deficient number, since it is larger than the sum of its proper divisors (835569).

1880001 is a wasteful number, since it uses less digits than its factorization.

1880001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208895 (or 208892 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 1880001 is about 1371.1312847426. The cubic root of 1880001 is about 123.4201377385.

Adding to 1880001 its reverse (1000881), we get a palindrome (2880882).

The spelling of 1880001 in words is "one million, eight hundred eighty thousand, one".