1201881 has 8 divisors (see below), whose sum is σ = 1632960. Its totient is φ = 786032.

The previous prime is 1201873. The next prime is 1201909. The reversal of 1201881 is 1881021.

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 1201881 - 2³ = 1201873 is a prime.

It is a super-2 number, since 2×1201881² = 2889035876322, which contains 22 as substring.

1201881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1201841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3621 + ... + 3938.

It is an arithmetic number, because the mean of its divisors is an integer number (204120).

2^1201881 is an apocalyptic number.

It is an amenable number.

1201881 is a deficient number, since it is larger than the sum of its proper divisors (431079).

1201881 is an equidigital number, since it uses as much as digits as its factorization.

1201881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7615.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 1201881 is about 1096.3033339364. The cubic root of 1201881 is about 106.3213518425.

The spelling of 1201881 in words is "one million, two hundred one thousand, eight hundred eighty-one".