1901121 has 8 divisors (see below), whose sum is σ = 2668320. Its totient is φ = 1200672.

The previous prime is 1901117. The next prime is 1901131. The reversal of 1901121 is 1211091.

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

It is not a de Polignac number, because 1901121 - 2² = 1901117 is a prime.

It is a super-2 number, since 2×1901121² = 7228522113282, which contains 22 as substring.

1901121 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1901121.

It is not an unprimeable number, because it can be changed into a prime (1901131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16620 + ... + 16733.

It is an arithmetic number, because the mean of its divisors is an integer number (333540).

2^1901121 is an apocalyptic number.

It is an amenable number.

1901121 is a deficient number, since it is larger than the sum of its proper divisors (767199).

1901121 is a wasteful number, since it uses less digits than its factorization.

1901121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33375.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 1901121 is about 1378.8114446871. The cubic root of 1901121 is about 123.8805865666.

The spelling of 1901121 in words is "one million, nine hundred one thousand, one hundred twenty-one".