1420191 has 6 divisors (see below), whose sum is σ = 2051400. Its totient is φ = 946788.

The previous prime is 1420169. The next prime is 1420201. The reversal of 1420191 is 1910241.

It is not a de Polignac number, because 1420191 - 2⁷ = 1420063 is a prime.

It is a super-3 number, since 3×1420191³ = 8593330657848083613, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78891 + ... + 78908.

It is an arithmetic number, because the mean of its divisors is an integer number (341900).

2^1420191 is an apocalyptic number.

1420191 is a deficient number, since it is larger than the sum of its proper divisors (631209).

1420191 is a wasteful number, since it uses less digits than its factorization.

1420191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157805 (or 157802 counting only the distinct ones).

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

The square root of 1420191 is about 1191.7176679063. The cubic root of 1420191 is about 112.4041257250.

The spelling of 1420191 in words is "one million, four hundred twenty thousand, one hundred ninety-one".