1421161 has 4 divisors (see below), whose sum is σ = 1624192. Its totient is φ = 1218132.

The previous prime is 1421159. The next prime is 1421191. The reversal of 1421161 is 1611241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1421161 - 2¹ = 1421159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101505 + ... + 101518.

It is an arithmetic number, because the mean of its divisors is an integer number (406048).

2^1421161 is an apocalyptic number.

It is an amenable number.

1421161 is a deficient number, since it is larger than the sum of its proper divisors (203031).

1421161 is an equidigital number, since it uses as much as digits as its factorization.

1421161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203030.

The product of its digits is 48, while the sum is 16.

The square root of 1421161 is about 1192.1245740274. The cubic root of 1421161 is about 112.4297108255.

The spelling of 1421161 in words is "one million, four hundred twenty-one thousand, one hundred sixty-one".