1901881 has 8 divisors (see below), whose sum is σ = 2067200. Its totient is φ = 1743120.

The previous prime is 1901857. The next prime is 1901891. The reversal of 1901881 is 1881091.

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

It is a cyclic number.

It is not a de Polignac number, because 1901881 - 2⁹ = 1901369 is a prime.

It is a super-2 number, since 2×1901881² = 7234302676322, which contains 22 as substring.

1901881 is a modest number, since divided by 1881 gives 190 as remainder.

1901881 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901831) 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, 1026 + ... + 2203.

It is an arithmetic number, because the mean of its divisors is an integer number (258400).

2^1901881 is an apocalyptic number.

It is an amenable number.

1901881 is a deficient number, since it is larger than the sum of its proper divisors (165319).

1901881 is a wasteful number, since it uses less digits than its factorization.

1901881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 1901881 is about 1379.0870168340. The cubic root of 1901881 is about 123.8970920394.

The spelling of 1901881 in words is "one million, nine hundred one thousand, eight hundred eighty-one".