1421091 has 32 divisors (see below), whose sum is σ = 2462720. Its totient is φ = 793152.

The previous prime is 1421083. The next prime is 1421093. The reversal of 1421091 is 1901241.

It is not a de Polignac number, because 1421091 - 2³ = 1421083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13746 + ... + 13848.

It is an arithmetic number, because the mean of its divisors is an integer number (76960).

2^1421091 is an apocalyptic number.

1421091 is a deficient number, since it is larger than the sum of its proper divisors (1041629).

1421091 is a wasteful number, since it uses less digits than its factorization.

1421091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1421091 is about 1192.0952143181. The cubic root of 1421091 is about 112.4278648679.

The spelling of 1421091 in words is "one million, four hundred twenty-one thousand, ninety-one".